diff --git a/src/axios.ts b/src/axios.ts
index 8f8147c..d38aeac 100644
--- a/src/axios.ts
+++ b/src/axios.ts
@@ -2,17 +2,14 @@
  * @Author: early-autumn
  * @Date: 2020-04-15 12:45:18
  * @LastEditors: early-autumn
- * @LastEditTime: 2020-04-15 22:45:22
+ * @LastEditTime: 2020-04-16 23:29:26
  */
-import {
-  AxiosRequest,
-  AxiosRequestDefault,
-  AxiosMethodConfig,
-  ResponseData,
-  AxiosResponse,
-  AxiosInstance,
-} from './types';
+import { AxiosRequestConfig, ResponseData, AxiosResponse, AxiosInstance } from './types';
 import Axios from './core/Axios';
+import Cancel from './cancel/Cancel';
+import CancelToken from './cancel/CancelToken';
+import isCancel from './cancel/isCancel';
+import mergeConfig from './helper/mergeConfig';
 import defaults from './helper/defaults';
 
 /**
@@ -20,7 +17,7 @@ import defaults from './helper/defaults';
  *
  * 返回一个 axios 增强函数
  */
-function createInstance(config: AxiosRequestDefault): AxiosInstance {
+function createInstance(config: AxiosRequestConfig): AxiosInstance {
   const instance = new Axios(config);
 
   /**
@@ -37,10 +34,10 @@ function createInstance(config: AxiosRequestDefault): AxiosInstance {
    * @param config 调用方式二: 额外配置
    */
   function axios<T extends ResponseData>(
-    url: AxiosRequest | string,
-    config: AxiosMethodConfig = {}
+    url: AxiosRequestConfig | string,
+    config: AxiosRequestConfig = {}
   ): Promise<AxiosResponse<T>> {
-    let requestConfig: AxiosRequest;
+    let requestConfig: AxiosRequestConfig;
 
     // 调用方式一处理请求配置
     if (typeof url !== 'string') {
@@ -60,4 +57,19 @@ function createInstance(config: AxiosRequestDefault): AxiosInstance {
   return axios as AxiosInstance;
 }
 
-export default createInstance(defaults);
+const axios = createInstance(defaults);
+
+// 添加 Axios 类
+axios.Axios = Axios;
+
+// 添加 create 工厂方法
+axios.create = function create(config: AxiosRequestConfig) {
+  return createInstance(mergeConfig(axios.defaults, config));
+};
+
+// 添加取消相关
+axios.Cancel = Cancel;
+axios.CancelToken = CancelToken;
+axios.isCancel = isCancel;
+
+export default axios;
diff --git a/src/core/Axios.ts b/src/core/Axios.ts
index abc8e5c..5bb9d8b 100644
--- a/src/core/Axios.ts
+++ b/src/core/Axios.ts
@@ -2,26 +2,16 @@
  * @Author: early-autumn
  * @Date: 2020-04-13 18:00:27
  * @LastEditors: early-autumn
- * @LastEditTime: 2020-04-16 00:11:53
+ * @LastEditTime: 2020-04-17 00:10:39
  */
-import {
-  Method,
-  Params,
-  Data,
-  Interceptors,
-  AxiosRequest,
-  AxiosRequestDefault,
-  AxiosMethodConfig,
-  ResponseData,
-  AxiosResponse,
-  Axios,
-} from '../types';
+import { Method, Params, Data, Interceptors, AxiosRequestConfig, ResponseData, AxiosResponse, Axios } from '../types';
+import transformURL from '../helper/transformURL';
+import mergeConfig from '../helper/mergeConfig';
 import InterceptorManager from './InterceptorManager';
-import mergeConfig from './mergeConfig';
 import dispatchRequest from './dispatchRequest';
 
 interface PromiseCatch {
-  request: Promise<AxiosRequest>;
+  request: Promise<AxiosRequestConfig>;
   response?: Promise<AxiosResponse>;
 }
 
@@ -29,27 +19,36 @@ export default class AxiosStatic implements Axios {
   /**
    * 默认配置
    */
-  defaults: AxiosRequestDefault;
+  defaults: AxiosRequestConfig;
 
   /**
    *  Axios 拦截器
    */
   public interceptors: Interceptors;
 
-  constructor(config: AxiosRequestDefault) {
+  constructor(config: AxiosRequestConfig) {
     this.defaults = config;
     this.interceptors = {
-      request: new InterceptorManager<AxiosRequest>(),
+      request: new InterceptorManager<AxiosRequestConfig>(),
       response: new InterceptorManager<AxiosResponse>(),
     };
   }
 
+  /**
+   * baseURL + url + params 得到完整请求地址
+   *
+   * @param config 请求配置
+   */
+  public getUri(config: AxiosRequestConfig): string {
+    return transformURL(mergeConfig(this.defaults, config));
+  }
+
   /**
    * 发送 HTTP 请求
    *
    * @param config 请求配置
    */
-  public request<T extends ResponseData>(config: AxiosRequest): Promise<AxiosResponse<T>> {
+  public request<T extends ResponseData>(config: AxiosRequestConfig): Promise<AxiosResponse<T>> {
     config = mergeConfig(this.defaults, config);
 
     const promise: PromiseCatch = {
@@ -57,7 +56,7 @@ export default class AxiosStatic implements Axios {
     };
 
     // 执行前置拦截器
-    this.interceptors.request.forEach(({ resolved, rejected }) => {
+    this.interceptors.request.forEach(function executor({ resolved, rejected }) {
       promise.request = promise.request.then(resolved, rejected);
     }, 'reverse');
 
@@ -67,7 +66,7 @@ export default class AxiosStatic implements Axios {
     });
 
     // 执行后置拦截器
-    this.interceptors.response.forEach(({ resolved, rejected }) => {
+    this.interceptors.response.forEach(function executor({ resolved, rejected }) {
       promise.response = promise.response?.then(resolved, rejected);
     });
 
@@ -84,7 +83,7 @@ export default class AxiosStatic implements Axios {
   public options<T extends ResponseData>(
     url: string,
     params?: Params,
-    config?: AxiosMethodConfig
+    config?: AxiosRequestConfig
   ): Promise<AxiosResponse<T>> {
     return this._requestMethodWithoutParams<T>('options', url, params, config);
   }
@@ -99,7 +98,7 @@ export default class AxiosStatic implements Axios {
   public get<T extends ResponseData>(
     url: string,
     params?: Params,
-    config?: AxiosMethodConfig
+    config?: AxiosRequestConfig
   ): Promise<AxiosResponse<T>> {
     return this._requestMethodWithoutParams<T>('get', url, params, config);
   }
@@ -114,7 +113,7 @@ export default class AxiosStatic implements Axios {
   public head<T extends ResponseData>(
     url: string,
     params?: Params,
-    config?: AxiosMethodConfig
+    config?: AxiosRequestConfig
   ): Promise<AxiosResponse<T>> {
     return this._requestMethodWithoutParams<T>('head', url, params, config);
   }
@@ -126,7 +125,11 @@ export default class AxiosStatic implements Axios {
    * @param data   请求数据
    * @param config 额外配置
    */
-  public post<T extends ResponseData>(url: string, data?: Data, config?: AxiosMethodConfig): Promise<AxiosResponse<T>> {
+  public post<T extends ResponseData>(
+    url: string,
+    data?: Data,
+    config?: AxiosRequestConfig
+  ): Promise<AxiosResponse<T>> {
     return this._requestMethodWithoutData<T>('post', url, data, config);
   }
 
@@ -137,7 +140,7 @@ export default class AxiosStatic implements Axios {
    * @param data   请求数据
    * @param config 额外配置
    */
-  public put<T extends ResponseData>(url: string, data?: Data, config?: AxiosMethodConfig): Promise<AxiosResponse<T>> {
+  public put<T extends ResponseData>(url: string, data?: Data, config?: AxiosRequestConfig): Promise<AxiosResponse<T>> {
     return this._requestMethodWithoutData<T>('put', url, data, config);
   }
 
@@ -151,7 +154,7 @@ export default class AxiosStatic implements Axios {
   public delete<T extends ResponseData>(
     url: string,
     params?: Params,
-    config?: AxiosMethodConfig
+    config?: AxiosRequestConfig
   ): Promise<AxiosResponse<T>> {
     return this._requestMethodWithoutParams<T>('delete', url, params, config);
   }
@@ -166,7 +169,7 @@ export default class AxiosStatic implements Axios {
   public trace<T extends ResponseData>(
     url: string,
     params?: Params,
-    config?: AxiosMethodConfig
+    config?: AxiosRequestConfig
   ): Promise<AxiosResponse<T>> {
     return this._requestMethodWithoutParams<T>('trace', url, params, config);
   }
@@ -181,7 +184,7 @@ export default class AxiosStatic implements Axios {
   public connect<T extends ResponseData>(
     url: string,
     params?: Params,
-    config?: AxiosMethodConfig
+    config?: AxiosRequestConfig
   ): Promise<AxiosResponse<T>> {
     return this._requestMethodWithoutParams<T>('connect', url, params, config);
   }
@@ -198,7 +201,7 @@ export default class AxiosStatic implements Axios {
     method: Method,
     url: string,
     params?: Params,
-    config: AxiosMethodConfig = {}
+    config: AxiosRequestConfig = {}
   ): Promise<AxiosResponse<T>> {
     return this.request<T>({
       ...config,
@@ -220,7 +223,7 @@ export default class AxiosStatic implements Axios {
     method: Method,
     url: string,
     data?: Data,
-    config: AxiosMethodConfig = {}
+    config: AxiosRequestConfig = {}
   ): Promise<AxiosResponse<T>> {
     return this.request<T>({
       ...config,
diff --git a/src/core/createError.ts b/src/core/createError.ts
index 393f682..5ced59b 100644
--- a/src/core/createError.ts
+++ b/src/core/createError.ts
@@ -2,9 +2,9 @@
  * @Author: early-autumn
  * @Date: 2020-04-14 22:23:39
  * @LastEditors: early-autumn
- * @LastEditTime: 2020-04-15 15:50:18
+ * @LastEditTime: 2020-04-16 20:17:51
  */
-import { AxiosRequest, AxiosResponse } from '../types';
+import { AxiosRequestConfig, AxiosResponse } from '../types';
 
 /**
  * AxiosError 继承自 Error
@@ -13,19 +13,22 @@ class AxiosError extends Error {
   /**
    * 是 Axios 错误
    */
-  isAxiosError = true;
+  isAxiosError: boolean;
+
   /**
    * 请求配置
    */
-  config: AxiosRequest;
+  config: AxiosRequestConfig;
+
   /**
    * 请求响应体
    */
   response?: AxiosResponse;
 
-  constructor(message: string, config: AxiosRequest, response?: AxiosResponse) {
+  constructor(message: string, config: AxiosRequestConfig, response?: AxiosResponse) {
     super(message);
 
+    this.isAxiosError = true;
     this.config = config;
     this.response = response;
 
@@ -43,6 +46,6 @@ class AxiosError extends Error {
  * @param config   请求配置
  * @param response 请求响应体
  */
-export default function createError(message: string, config: AxiosRequest, response?: AxiosResponse): AxiosError {
+export default function createError(message: string, config: AxiosRequestConfig, response?: AxiosResponse): AxiosError {
   return new AxiosError(message, config, response);
 }
diff --git a/src/core/dispatchRequest.ts b/src/core/dispatchRequest.ts
index db99d01..f233648 100644
--- a/src/core/dispatchRequest.ts
+++ b/src/core/dispatchRequest.ts
@@ -1,36 +1,92 @@
 /*
  * @Author: early-autumn
- * @Date: 2020-04-13 15:22:22
+ * @Date: 2020-04-13 18:01:16
  * @LastEditors: early-autumn
- * @LastEditTime: 2020-04-15 20:21:13
+ * @LastEditTime: 2020-04-17 00:07:35
  */
-import { AxiosRequest, AxiosResponse } from '../types';
-import processURL from '../helper/processURL';
-import processData from '../helper/processData';
+import { MethodType, ResponseData, AxiosRequestConfig, AxiosResponse } from '../types';
+import { merge } from '../helper/utils';
+import transformURL from '../helper/transformURL';
+import transformData from '../helper/transformData';
+import createError from './createError';
+
 import request from './request';
 
 /**
- * 转换请求配置
+ * 发送请求
  *
  * @param config 请求配置
  */
-function transformRequestConfig(config: AxiosRequest): void {
-  const { url, params, data } = config;
+export default function dispatchRequest(config: AxiosRequestConfig): Promise<AxiosResponse> {
+  return new Promise((resolve, reject) => {
+    const { headers = {}, cancelToken, ...options } = config;
 
-  config.url = processURL(url, params);
+    // 把方法转成全大写
+    config.method = (config.method?.toUpperCase() ?? 'GET') as MethodType;
 
-  if (data !== undefined) {
-    config.data = processData(data);
-  }
-}
-
-/**
- * 触发请求
- *
- * @param config 请求配置
- */
-export default function dispatchRequest(config: AxiosRequest): Promise<AxiosResponse> {
-  transformRequestConfig(config);
-
-  return request(config);
+    // 合并 headers
+    config.headers = merge(
+      headers.common ?? {},
+      (headers[(config.method as string).toLowerCase()] ?? {}) as AnyObject,
+      headers
+    );
+
+    // 转换请求数据
+    config.data = transformData(config.data, config.headers, config.transformRequest);
+
+    /**
+     * 抛出异常
+     *
+     * @param param0   错误信息
+     * @param response 请求响应体
+     */
+    function catchError({ errMsg }: { errMsg: string }, response?: AxiosResponse): void {
+      reject(createError(errMsg, config, response));
+    }
+
+    /**
+     * 检查请求结果的状态码
+     *
+     * @param result 请求结果
+     */
+    function checkStatusCode(result: WechatMiniprogram.RequestSuccessCallbackResult): void {
+      const { header: headers, ...rest } = result;
+      const response = { ...rest, headers, config };
+      const { statusCode, errMsg } = response;
+
+      // 成功
+      if (config.validateStatus === undefined || config.validateStatus(statusCode)) {
+        // 转换响应数据
+        response.data = transformData(response.data, response.headers, config.transformResponse) as ResponseData;
+
+        resolve(response);
+      }
+      // 失败
+      else {
+        // `Request failed with status code ${statusCode}`
+        catchError({ errMsg }, response);
+      }
+    }
+
+    // 发送请求
+    const requestTask = request({
+      ...options,
+      url: transformURL(config),
+      method: config.method,
+      header: config.headers,
+      data: config.data,
+      success: checkStatusCode,
+      fail: catchError,
+      complete: undefined,
+    });
+
+    // 如果存在取消令牌
+    // 则调用取消令牌里的 listener 监听用户的取消操作
+    if (cancelToken !== undefined) {
+      cancelToken.listener.then(function onCanceled(reason): void {
+        requestTask.abort();
+        reject(reason);
+      });
+    }
+  });
 }
diff --git a/src/core/mergeConfig.ts b/src/core/mergeConfig.ts
deleted file mode 100644
index 896cc7e..0000000
--- a/src/core/mergeConfig.ts
+++ /dev/null
@@ -1,15 +0,0 @@
-/*
- * @Author: early-autumn
- * @Date: 2020-04-15 22:48:25
- * @LastEditors: early-autumn
- * @LastEditTime: 2020-04-16 00:18:44
- */
-import { AxiosRequest, AxiosRequestDefault } from '../types';
-
-/**
- * 合并默认配置和请求配置
- */
-export default function mergeConfig(defaults: AxiosRequestDefault, config: AxiosRequest): AxiosRequest {
-  console.log(defaults);
-  return config;
-}
diff --git a/src/core/request.ts b/src/core/request.ts
index 37a4891..826efc2 100644
--- a/src/core/request.ts
+++ b/src/core/request.ts
@@ -1,70 +1,34 @@
 /*
  * @Author: early-autumn
- * @Date: 2020-04-13 18:01:16
+ * @Date: 2020-04-16 00:48:45
  * @LastEditors: early-autumn
- * @LastEditTime: 2020-04-15 23:19:04
+ * @LastEditTime: 2020-04-16 15:22:40
  */
-import { MethodType, AxiosRequest, AxiosResponse } from '../types';
-import createError from './createError';
+
+let request = wx?.request;
 
 /**
- * 发送请求
+ * #### 非微信小程序中使用 axios 前需要先调用此函数重新设置请求方法
+ *
+ * 假设在 uniapp 中使用:
+ *
+ * ```typescript
+ * import axios, { setRequest } from 'axios-miniprogram';
+ *
+ * // 先设置 request
+ * setRequest(uni.request);
+ *
+ * // 现在可以正常发送请求了
+ * axios('/test')
+ * ```
+ *
+ * * 使用 `javascript` 开发忽略, 使用 `typescript` 开发注意: `axios 类型系统`是基于`微信小程序内置类型`定义的, 在其他平台使用类型可能存在不兼容的情况
+ *
+ * @param r 需要设置的请求方法
  *
- * @param config 请求配置
  */
-export default function request(config: AxiosRequest): Promise<AxiosResponse> {
-  return new Promise((resolve, reject) => {
-    const { cancelToken, method, ...options } = config;
-    // method 转为全大写
-    const methodType = method?.toUpperCase() as MethodType;
-
-    /**
-     * 抛出异常
-     *
-     * @param param0   错误信息
-     * @param response 请求响应体
-     */
-    function catchError({ errMsg }: { errMsg: string }, response?: AxiosResponse): void {
-      reject(createError(errMsg, config, response));
-    }
-
-    /**
-     * 检查请求结果的状态码
-     *
-     * @param result 请求结果
-     */
-    function checkStatusCode(result: WechatMiniprogram.RequestSuccessCallbackResult): void {
-      const response = { ...result, config };
-      const { statusCode, errMsg } = response;
-
-      // 成功
-      if (statusCode >= 200 && statusCode < 300) {
-        resolve(response);
-      }
-      // 失败
-      else {
-        // `Request failed with status code ${statusCode}`
-        catchError({ errMsg }, response);
-      }
-    }
-
-    // 发送请求
-    // 替换 options 中的 success fail complete
-    const request = wx.request({
-      ...options,
-      method: methodType,
-      success: checkStatusCode,
-      fail: catchError,
-      complete: undefined,
-    });
-
-    // 如果存在取消令牌
-    // 则调用取消令牌里的 listener 监听用户的取消操作
-    if (cancelToken !== undefined) {
-      cancelToken.listener.then(function onCanceled(reason): void {
-        request.abort();
-        reject(reason);
-      });
-    }
-  });
+export function setRequest(r: any): void {
+  request = r;
 }
+
+export default request;
diff --git a/src/helper/defaults.ts b/src/helper/defaults.ts
index 5825445..474ec41 100644
--- a/src/helper/defaults.ts
+++ b/src/helper/defaults.ts
@@ -2,13 +2,14 @@
  * @Author: early-autumn
  * @Date: 2020-04-15 22:09:38
  * @LastEditors: early-autumn
- * @LastEditTime: 2020-04-15 23:20:30
+ * @LastEditTime: 2020-04-16 21:39:21
  */
-import { AxiosRequestDefault } from '../types';
+import { AxiosRequestConfig } from '../types';
 
-const defaults: AxiosRequestDefault = {
+const defaults: AxiosRequestConfig = {
   method: 'get',
-  header: {
+  timeout: 0,
+  headers: {
     common: {
       Accept: 'application/json, test/plain, */*',
     },
@@ -25,6 +26,9 @@ const defaults: AxiosRequestDefault = {
     trace: {},
     connect: {},
   },
+  validateStatus: function validateStatus(status) {
+    return status >= 200 && status < 300;
+  },
 };
 
 export default defaults;
diff --git a/src/helper/mergeConfig.ts b/src/helper/mergeConfig.ts
new file mode 100644
index 0000000..7d12890
--- /dev/null
+++ b/src/helper/mergeConfig.ts
@@ -0,0 +1,62 @@
+/*
+ * @Author: early-autumn
+ * @Date: 2020-04-15 22:48:25
+ * @LastEditors: early-autumn
+ * @LastEditTime: 2020-04-16 21:10:33
+ */
+import { AxiosRequestConfig } from '../types';
+import { isPlainObject, deepMerge } from '../helper/utils';
+
+/**
+ * 合并配置
+ *
+ * @param config1 配置 1
+ * @param config2 配置 2
+ */
+export default function mergeConfig(config1: AxiosRequestConfig, config2: AxiosRequestConfig): AxiosRequestConfig {
+  const config: AxiosRequestConfig = {};
+
+  const keys1: ['url', 'method', 'data'] = ['url', 'method', 'data'];
+  const keys2: ['headers', 'params'] = ['headers', 'params'];
+  const keys3: [
+    'baseURL',
+    'dataType',
+    'responseType',
+    'timeout',
+    'enableHttp2',
+    'enableQuic',
+    'enableCache',
+    'cancelToken'
+  ] = ['baseURL', 'dataType', 'responseType', 'timeout', 'enableHttp2', 'enableQuic', 'enableCache', 'cancelToken'];
+
+  // 只取 config2 中的值
+  keys1.forEach((key) => {
+    if (config2[key] !== undefined) {
+      config[key] = config2[key] as any;
+    }
+  });
+
+  // 深度合并
+  keys2.forEach((key) => {
+    if (isPlainObject(config2[key])) {
+      config[key] = deepMerge(config1[key] as any, config2[key] as any);
+    } else if (config2[key] !== undefined) {
+      config[key] = config2[key];
+    } else if (isPlainObject(config1[key])) {
+      config[key] = deepMerge(config1[key] as any);
+    } else if (config1[key] !== undefined) {
+      config[key] = config1[key];
+    }
+  });
+
+  // 优先取 config2 中的配置
+  keys3.forEach((key) => {
+    if (config2[key] !== undefined) {
+      config[key] = config2[key] as any;
+    } else if (config1[key] !== undefined) {
+      config[key] = config1[key] as any;
+    }
+  });
+
+  return config;
+}
diff --git a/src/helper/processData.ts b/src/helper/processData.ts
deleted file mode 100644
index b16c5fc..0000000
--- a/src/helper/processData.ts
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- * @Author: early-autumn
- * @Date: 2020-04-13 22:50:35
- * @LastEditors: early-autumn
- * @LastEditTime: 2020-04-14 23:09:59
- */
-import { Data } from '../types';
-import { isPlainObject } from './utils';
-
-/**
- * 处理请求参数
- *
- * @param data 请求参数
- */
-export default function processData(data: Data): Data {
-  if (!isPlainObject(data)) {
-    return data;
-  }
-
-  return JSON.stringify(data);
-}
diff --git a/src/helper/processURL.ts b/src/helper/processURL.ts
index 1b3aa1a..1257e9a 100644
--- a/src/helper/processURL.ts
+++ b/src/helper/processURL.ts
@@ -2,7 +2,7 @@
  * @Author: early-autumn
  * @Date: 2020-04-13 21:45:45
  * @LastEditors: early-autumn
- * @LastEditTime: 2020-04-15 11:54:36
+ * @LastEditTime: 2020-04-16 21:55:26
  */
 import { Params } from '../types';
 import { isPlainObject, isDate } from './utils';
@@ -24,36 +24,35 @@ function encode(str: string): string {
 }
 
 /**
- * 拼接 URL 和 参数
+ * 拼接 URL 和 序列化参数
  *
- * @param url       请求地址
- * @param paramsStr 请求参数
+ * @param url              请求地址
+ * @param serializedParams 序列化参数
  */
-function joinURL(url: string, paramsStr: string): string {
+function joinURL(url: string, serializedParams: string): string {
+  if (serializedParams === '') {
+    return url;
+  }
+
   // 移除 hash
-  const hashIndex = paramsStr.indexOf('#');
+  const hashIndex = serializedParams.indexOf('#');
   if (hashIndex !== -1) {
-    paramsStr = paramsStr.slice(0, hashIndex);
+    serializedParams = serializedParams.slice(0, hashIndex);
   }
 
   // 拼接前缀
   const prefix = url.indexOf('?') === -1 ? '?' : '&';
-  paramsStr = `${prefix}${paramsStr}`;
+  serializedParams = `${prefix}${serializedParams}`;
 
-  return `${url}${paramsStr}`;
+  return `${url}${serializedParams}`;
 }
 
 /**
- * 处理 URL 参数
+ * 默认参数序列化
  *
- * @param url    请求地址
  * @param params 请求参数
  */
-export default function processURL(url: string, params?: Params): string {
-  if (params === undefined) {
-    return url;
-  }
-
+function paramsSerializerDefault(params: AnyObject): string {
   const parts: string[] = [];
 
   Object.entries(params).forEach(([key, value]): void => {
@@ -80,9 +79,32 @@ export default function processURL(url: string, params?: Params): string {
     });
   });
 
-  if (parts.length !== 0) {
-    url = joinURL(url, parts.join('&'));
+  return parts.join('&');
+}
+
+/**
+ * 处理 URL 参数
+ *
+ * @param url              请求地址
+ * @param params           请求参数
+ * @param paramsSerializer 自定义参数序列化
+ */
+export default function processURL(
+  url: string,
+  params?: Params,
+  paramsSerializer?: (params: AnyObject) => string
+): string {
+  if (params === undefined) {
+    return url;
   }
 
-  return url;
+  let serializedParams = '';
+
+  if (paramsSerializer !== undefined) {
+    serializedParams = paramsSerializer(params);
+  } else {
+    serializedParams = paramsSerializerDefault(params);
+  }
+
+  return joinURL(url, serializedParams);
 }
diff --git a/src/helper/transformData.ts b/src/helper/transformData.ts
new file mode 100644
index 0000000..dec289e
--- /dev/null
+++ b/src/helper/transformData.ts
@@ -0,0 +1,30 @@
+/*
+ * @Author: early-autumn
+ * @Date: 2020-04-16 22:37:44
+ * @LastEditors: early-autumn
+ * @LastEditTime: 2020-04-17 00:09:19
+ */
+import { Data, Headers, TransformData } from '../types';
+
+/**
+ * 转换数据
+ *
+ * @param data       请求数据或响应诗句
+ * @param headers    请求头或响应头
+ * @param transforms 请求数据转换函数或响应数据转换函数
+ */
+export default function transformData(data: Data, headers?: Headers, transforms?: TransformData | TransformData[]) {
+  if (transforms === undefined) {
+    return data;
+  }
+
+  if (!Array.isArray(transforms)) {
+    transforms = [transforms];
+  }
+
+  transforms.forEach((transform: TransformData) => {
+    data = transform(data, headers);
+  });
+
+  return data;
+}
diff --git a/src/helper/transformURL.ts b/src/helper/transformURL.ts
new file mode 100644
index 0000000..f4edc62
--- /dev/null
+++ b/src/helper/transformURL.ts
@@ -0,0 +1,21 @@
+/*
+ * @Author: early-autumn
+ * @Date: 2020-04-17 00:00:21
+ * @LastEditors: early-autumn
+ * @LastEditTime: 2020-04-17 00:09:47
+ */
+import { AxiosRequestConfig } from '../types';
+import { isAbsoluteURL, combineURL } from './utils';
+import processURL from './processURL';
+
+/**
+ * baseURL + url + params 得到完整请求地址
+ *
+ * @param config 请求配置
+ */
+export default function transformURL(config: AxiosRequestConfig): string {
+  const { baseURL = '', url = '', params, paramsSerializer } = config;
+  const fullURL = isAbsoluteURL(url) ? url : combineURL(baseURL, url);
+
+  return processURL(fullURL, params, paramsSerializer);
+}
diff --git a/src/helper/utils.ts b/src/helper/utils.ts
index a950cf8..fa4e568 100644
--- a/src/helper/utils.ts
+++ b/src/helper/utils.ts
@@ -2,7 +2,7 @@
  * @Author: early-autumn
  * @Date: 2020-04-13 21:55:40
  * @LastEditors: early-autumn
- * @LastEditTime: 2020-04-14 14:28:31
+ * @LastEditTime: 2020-04-16 23:37:50
  */
 const _toString = Object.prototype.toString;
 
@@ -24,6 +24,78 @@ export function isPlainObject(obj: any): obj is object {
   return _toString.call(obj) === '[object Object]';
 }
 
-// export function isObject(value: any): value is object {
-//   return value !== null && typeof value === 'object';
-// }
+/**
+ * 检查是否是一个绝对 URL
+ *
+ * xxx:// 或者 "//" 开头,  视为绝对地址
+ *
+ * @param url 需要检查的 URL
+ */
+export function isAbsoluteURL(url: string): boolean {
+  return /^([a-z][a-z\d\+\-\.]*:)?\/\//i.test(url);
+}
+
+/**
+ * 拼接 baseURL 和 url 获得完整的 URL
+ *
+ * combineURL('1/2///','////3/4') => '1/2/3/4'
+ */
+export function combineURL(baseURL: string, url: string): string {
+  return `${baseURL.replace(/\/*$/, '')}/${url.replace(/^\/*/, '')}`;
+}
+
+/**
+ * 浅合并多个对象
+ *
+ * @param objs n 个对象
+ */
+export function merge(...objs: Record<string, any>[]): Record<string, any> {
+  const result: Record<string, any> = {};
+
+  function assignValue(key: string, val: any): void {
+    if (isPlainObject(result[key]) && isPlainObject(val)) {
+      result[key] = merge(result[key], val);
+    } else {
+      result[key] = val;
+    }
+  }
+
+  objs.forEach((obj: Record<string, any>): void => {
+    Object.entries(obj).forEach(([key, value]) => assignValue(key, value));
+  });
+
+  return result;
+}
+
+/**
+ * 深度合并多个对象
+ *
+ * @param objs n 个对象
+ */
+export function deepMerge(...objs: Record<string, any>[]): Record<string, any> {
+  const result: Record<string, any> = {};
+
+  function assignValue(key: string, val: any) {
+    // 如果当前结果和当前值都为普通对象
+    // 递归进行深度合并
+    if (isPlainObject(result[key]) && isPlainObject(val)) {
+      result[key] = deepMerge(result[key], val);
+    }
+    // 如果只有当前值为普通对象
+    // 直接深拷贝当前值
+    else if (isPlainObject(val)) {
+      result[key] = deepMerge({}, val);
+    }
+    // 如果都不是普通对象
+    // 直接赋值
+    else {
+      result[key] = val;
+    }
+  }
+
+  objs.forEach((obj: Record<string, any>): void => {
+    Object.entries(obj).forEach(([key, value]) => assignValue(key, value));
+  });
+
+  return result;
+}
diff --git a/src/index.ts b/src/index.ts
index 1c2412d..c4178f4 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -2,34 +2,11 @@
  * @Author: early-autumn
  * @Date: 2020-04-14 23:22:52
  * @LastEditors: early-autumn
- * @LastEditTime: 2020-04-15 16:56:41
+ * @LastEditTime: 2020-04-16 10:20:12
  */
 import axios from './axios';
+import { setRequest } from './core/request';
 
-interface Test {
-  test1: string;
-  test2: string;
-  test3: string;
-}
+export { setRequest };
 
-axios<Test>('/test').then((res) => {
-  console.log(res.data.test3);
-});
-
-axios<Test>({ url: '' }).then((res) => {
-  console.log(res.data.test1);
-});
-
-axios
-  .request<Test>({ url: '' })
-  .then((res) => {
-    console.log(res.data.test1);
-  });
-
-axios.get<Test>('', {}, {}).then((res) => {
-  console.log(res.data.test1);
-});
-
-// axios.post<string>('', {}, {}).then((res) => {
-//   console.log(res.data);
-// });
+export default axios;
diff --git a/src/types.ts b/src/types.ts
index e837be3..d51621e 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -2,7 +2,7 @@
  * @Author: early-autumn
  * @Date: 2020-04-13 15:23:53
  * @LastEditors: early-autumn
- * @LastEditTime: 2020-04-15 23:48:48
+ * @LastEditTime: 2020-04-17 00:06:34
  */
 import 'miniprogram-api-typings';
 
@@ -31,10 +31,80 @@ export declare type Params = AnyObject;
  */
 export declare type Data = WechatMiniprogram.RequestOption['data'];
 
+/**
+ * Axios 请求头
+ */
+export interface Headers {
+  /**
+   * 通用配置
+   */
+  common?: Record<string, string>;
+
+  /**
+   * options 配置
+   */
+  options?: Record<string, string>;
+
+  /**
+   * get 配置
+   */
+  get?: Record<string, string>;
+
+  /**
+   * head 配置
+   */
+  head?: Record<string, string>;
+
+  /**
+   * post 配置
+   */
+  post?: Record<string, string>;
+
+  /**
+   * put 配置
+   */
+  put?: Record<string, string>;
+
+  /**
+   * delete 配置
+   */
+  delete?: Record<string, string>;
+
+  /**
+   * trace 配置
+   */
+  trace?: Record<string, string>;
+
+  /**
+   * connect 配置
+   */
+  connect?: Record<string, string>;
+
+  /**
+   * 自定义配置
+   */
+  [x: string]: string | Record<string, string> | undefined;
+}
+
+export interface TransformData {
+  (data: Data, headers?: Headers): Data;
+}
+
 /**
  * 请求配置
  */
-export type AxiosRequest = Omit<WechatMiniprogram.RequestOption, 'method' | 'success' | 'fail' | 'complete'> & {
+export declare interface AxiosRequestConfig
+  extends Pick<WechatMiniprogram.RequestOption, 'dataType' | 'responseType' | 'timeout'> {
+  /**
+   * 基础地址
+   */
+  baseURL?: string;
+
+  /**
+   * 开发者服务器接口地址
+   */
+  url?: string;
+
   /** HTTP 请求方法
    *
    * 可选值：
@@ -67,6 +137,21 @@ export type AxiosRequest = Omit<WechatMiniprogram.RequestOption, 'method' | 'suc
    */
   data?: Data;
 
+  /**
+   * 请求头配置
+   */
+  headers?: Headers;
+
+  /**
+   * 转换请求数据
+   */
+  transformRequest?: TransformData | TransformData[];
+
+  /**
+   * 转换响应数据
+   */
+  transformResponse?: TransformData | TransformData[];
+
   /**
    * 开启 http2
    */
@@ -86,58 +171,17 @@ export type AxiosRequest = Omit<WechatMiniprogram.RequestOption, 'method' | 'suc
    * 取消令牌
    */
   cancelToken?: CancelToken;
-};
 
-/**
- * 请求默认配置
- */
-export declare type AxiosRequestDefault = Omit<AxiosRequest, 'url' | 'header' | 'cancelToken'> & {
   /**
-   * 基础地址
+   * 自定义合法状态码
    */
-  baseURL?: string;
+  validateStatus?: (status: number) => boolean;
+
   /**
-   * 请求头
+   * 自定义参数序列化
    */
-  header?: {
-    /**
-     * 公共请求头
-     */
-    common?: AnyObject;
-    /**
-     * options 请求头
-     */
-    options?: AnyObject;
-    /**
-     * get 请求头
-     */
-    get?: AnyObject;
-    /**
-     * head 请求头
-     */
-    head?: AnyObject;
-    /**
-     * post 请求头
-     */
-    post?: AnyObject;
-    /**
-     * put 请求头
-     */
-    put?: AnyObject;
-    /**
-     * delete 请求头
-     */
-    delete?: AnyObject;
-    /**
-     * trace 请求头
-     */
-    trace?: AnyObject;
-    /**
-     * connect 请求头
-     */
-    connect?: AnyObject;
-  };
-};
+  paramsSerializer?: (params: AnyObject) => string;
+}
 
 /**
  * 服务端响应数据
@@ -148,16 +192,21 @@ export declare type ResponseData = WechatMiniprogram.RequestSuccessCallbackResul
  * 请求响应体
  */
 export interface AxiosResponse<T extends ResponseData = ResponseData>
-  extends WechatMiniprogram.RequestSuccessCallbackResult {
+  extends Omit<WechatMiniprogram.RequestSuccessCallbackResult, 'header'> {
   /**
    * 开发者服务器返回的数据
    */
   data: T;
 
+  /**
+   * 开发者服务器返回的 HTTP Response Headers
+   */
+  headers: Headers;
+
   /**
    * 请求配置
    */
-  config: AxiosRequest;
+  config: AxiosRequestConfig;
 }
 
 /**
@@ -177,7 +226,7 @@ export interface InterceptorRejected {
 /**
  * 拦截器
  */
-export declare type Interceptor<T = any> = {
+export interface Interceptor<T = any> {
   /**
    * 拦截器成功的回调函数
    */
@@ -186,7 +235,7 @@ export declare type Interceptor<T = any> = {
    * 拦截器失败的回调函数
    */
   rejected: InterceptorRejected;
-};
+}
 
 /**
  * 拦截器执行器
@@ -230,19 +279,13 @@ export interface Interceptors {
   /**
    * request 请求前置拦截器
    */
-  request: InterceptorManager<AxiosRequest>;
+  request: InterceptorManager<AxiosRequestConfig>;
 
   /**
    * response 请求后置拦截器
    */
   response: InterceptorManager<AxiosResponse>;
 }
-
-/**
- * Axios 请求方法别名额外配置类型
- */
-export type AxiosMethodConfig = Omit<AxiosRequest, 'url'>;
-
 /**
  * Axios
  */
@@ -250,19 +293,26 @@ export interface Axios {
   /**
    * 默认配置
    */
-  defaults: AxiosRequestDefault;
+  defaults: AxiosRequestConfig;
 
   /**
    * Axios 拦截器
    */
   interceptors: Interceptors;
 
+  /**
+   * baseURL + url + params 得到完整请求地址
+   *
+   * @param config 请求配置
+   */
+  getUri(config: AxiosRequestConfig): string;
+
   /**
    * 发送 HTTP 请求
    *
    * @param config 请求配置
    */
-  request<T extends ResponseData>(config: AxiosRequest): Promise<AxiosResponse<T>>;
+  request<T extends ResponseData>(config: AxiosRequestConfig): Promise<AxiosResponse<T>>;
 
   /**
    * 发送 HTTP 请求 OPTIONS
@@ -271,7 +321,7 @@ export interface Axios {
    * @param params 请求参数
    * @param config 额外配置
    */
-  options<T extends ResponseData>(url: string, params?: Params, config?: AxiosMethodConfig): Promise<AxiosResponse<T>>;
+  options<T extends ResponseData>(url: string, params?: Params, config?: AxiosRequestConfig): Promise<AxiosResponse<T>>;
 
   /**
    * 发送 HTTP 请求 GET
@@ -280,7 +330,7 @@ export interface Axios {
    * @param params 请求参数
    * @param config 额外配置
    */
-  get<T extends ResponseData>(url: string, params?: Params, config?: AxiosMethodConfig): Promise<AxiosResponse<T>>;
+  get<T extends ResponseData>(url: string, params?: Params, config?: AxiosRequestConfig): Promise<AxiosResponse<T>>;
 
   /**
    * 发送 HTTP 请求 HEAD
@@ -289,7 +339,7 @@ export interface Axios {
    * @param params 请求参数
    * @param config 额外配置
    */
-  head<T extends ResponseData>(url: string, params?: Params, config?: AxiosMethodConfig): Promise<AxiosResponse<T>>;
+  head<T extends ResponseData>(url: string, params?: Params, config?: AxiosRequestConfig): Promise<AxiosResponse<T>>;
 
   /**
    * 发送 HTTP 请求 POST
@@ -298,7 +348,7 @@ export interface Axios {
    * @param data   请求数据
    * @param config 额外配置
    */
-  post<T extends ResponseData>(url: string, data?: Data, config?: AxiosMethodConfig): Promise<AxiosResponse<T>>;
+  post<T extends ResponseData>(url: string, data?: Data, config?: AxiosRequestConfig): Promise<AxiosResponse<T>>;
 
   /**
    * 发送 HTTP 请求 PUT
@@ -307,7 +357,7 @@ export interface Axios {
    * @param data   请求数据
    * @param config 额外配置
    */
-  put<T extends ResponseData>(url: string, data?: Data, config?: AxiosMethodConfig): Promise<AxiosResponse<T>>;
+  put<T extends ResponseData>(url: string, data?: Data, config?: AxiosRequestConfig): Promise<AxiosResponse<T>>;
 
   /**
    * 发送 HTTP 请求 DELETE
@@ -316,7 +366,7 @@ export interface Axios {
    * @param params 请求参数
    * @param config 额外配置
    */
-  delete<T extends ResponseData>(url: string, params?: Params, config?: AxiosMethodConfig): Promise<AxiosResponse<T>>;
+  delete<T extends ResponseData>(url: string, params?: Params, config?: AxiosRequestConfig): Promise<AxiosResponse<T>>;
 
   /**
    * 发送 HTTP 请求 TRACE
@@ -325,7 +375,7 @@ export interface Axios {
    * @param params 请求参数
    * @param config 额外配置
    */
-  trace<T extends ResponseData>(url: string, params?: Data, config?: AxiosMethodConfig): Promise<AxiosResponse<T>>;
+  trace<T extends ResponseData>(url: string, params?: Data, config?: AxiosRequestConfig): Promise<AxiosResponse<T>>;
 
   /**
    * 发送 HTTP 请求 CONNECT
@@ -334,29 +384,14 @@ export interface Axios {
    * @param params 请求参数
    * @param config 额外配置
    */
-  connect<T extends ResponseData>(url: string, params?: Data, config?: AxiosMethodConfig): Promise<AxiosResponse<T>>;
+  connect<T extends ResponseData>(url: string, params?: Data, config?: AxiosRequestConfig): Promise<AxiosResponse<T>>;
 }
 
 /**
- * axios 增强函数
- *
- * 支持两种调用方式, 并含有 Axios 实例的所有属性和方法
+ * Axios 类接口
  */
-export interface AxiosInstance extends Axios {
-  /**
-   * 调用方式一
-   *
-   * @param config 请求配置
-   */
-  <T extends ResponseData>(config: AxiosRequest): Promise<AxiosResponse<T>>;
-
-  /**
-   * 调用方式二
-   *
-   * @param url    请求地址
-   * @param config 额外配置
-   */
-  <T extends ResponseData>(url: string, config?: AxiosMethodConfig): Promise<AxiosResponse<T>>;
+export interface AxiosConstructor {
+  new (config: AxiosRequestConfig): Axios;
 }
 
 /**
@@ -371,7 +406,7 @@ export interface AxiosError extends Error {
   /**
    * 请求配置
    */
-  config: AxiosRequest;
+  config: AxiosRequestConfig;
 
   /**
    * 请求响应体
@@ -428,6 +463,26 @@ export interface CancelToken {
   throwIfRequested(): void;
 }
 
+/**
+ * 取消令牌类接口
+ */
+
+export interface CancelTokenConstructor {
+  new (executor: CancelExecutor): CancelToken;
+  /**
+   * 返回一个 CancelTokenSource
+   *
+   * CancelTokenSource.token 是一个 CancelToken 对象
+   *
+   * CancelTokenSource.cancel 是一个 CancelAction 函数
+   *
+   * 调用 CancelTokenSource.cancel('这里可以填写您的错误信息')
+   *
+   * 取消 CancelTokenSource.token
+   */
+  source(): CancelTokenSource;
+}
+
 /**
  * 取消令牌 source
  */
@@ -442,3 +497,54 @@ export interface CancelTokenSource {
    */
   cancel: CancelAction;
 }
+
+/**
+ * axios 增强函数
+ *
+ * 支持两种调用方式, 并含有 Axios 实例的所有属性和方法
+ */
+export interface AxiosInstance extends Axios {
+  /**
+   * 调用方式一
+   *
+   * @param config 请求配置
+   */
+  <T extends ResponseData>(config: AxiosRequestConfig): Promise<AxiosResponse<T>>;
+
+  /**
+   * 调用方式二
+   *
+   * @param url    请求地址
+   * @param config 额外配置
+   */
+  <T extends ResponseData>(url: string, config?: AxiosRequestConfig): Promise<AxiosResponse<T>>;
+
+  /**
+   * Axios 类
+   */
+  Axios: AxiosConstructor;
+
+  /**
+   * 创建 Axios 实例
+   *
+   * @param config 全局配置
+   */
+  create(config: AxiosRequestConfig): Axios;
+
+  /**
+   * Cancel 类
+   */
+  Cancel: Cancel;
+
+  /**
+   * CancelToken 类
+   */
+  CancelToken: CancelTokenConstructor;
+
+  /**
+   * 是不是一个取消对象
+   *
+   * @param value 判断的值
+   */
+  isCancel: (value: any) => boolean;
+}
diff --git a/test/index.test.ts b/test/index.test.ts
index b5221a1..f65bed2 100644
--- a/test/index.test.ts
+++ b/test/index.test.ts
@@ -2,12 +2,12 @@
  * @Author: early-autumn
  * @Date: 2020-04-14 23:43:45
  * @LastEditors: early-autumn
- * @LastEditTime: 2020-04-14 23:45:11
+ * @LastEditTime: 2020-04-17 00:14:34
  */
 import { isDate } from '../src/helper/utils';
 
 describe('', () => {
-  it('', () => {
+  it('?', () => {
     expect(isDate({})).toBeFalsy();
   });
 });