diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..5226e22
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,30 @@
+declare module '@gm5/core' {
+  import { Server } from 'http'
+
+  interface Middleware {
+    (req: Request, res: Response, next: () => void): void
+  }
+
+  interface Installable {
+    name: string
+    install: (args: any) => any
+  }
+
+  class Five {
+    get server(): Server
+
+    set(obj: Config): this
+
+    get(key: string): any
+
+    use(fn: Middleware): this
+
+    install(module: Installable, args: any): this
+
+    preload(dir: string): this
+
+    listen(port?: number, callback?: () => void): this
+  }
+
+  export function createApp(conf?: object): Five
+}
diff --git a/index.js b/index.js
index 01a742c..5c63859 100644
--- a/index.js
+++ b/index.js
@@ -28,11 +28,15 @@ class Five {
   #middlewares = [createCors()]
 
   #server = null
+  #online = false
 
   constructor() {
     readonlyProp(this, 'state', Object.create(null))
   }
 
+  /**
+   * 循环顺序执行中间件, 直到执行完所有中间件或没有调用next
+   */
   async #loop(req, res, idx = 0) {
     let fn = this.#middlewares[idx]
     if (fn) {
@@ -43,6 +47,12 @@ class Five {
     }
   }
 
+  // 注入实例化对象到实例池中
+  #install({ name, install }, args) {
+    this['$$' + name] = install.call(this, args)
+    return this
+  }
+
   /*------------------------------------------------------------------------*/
 
   get server() {
@@ -76,23 +86,34 @@ class Five {
     return this.#config[key]
   }
 
-  // 加载中间件
-  // 与别的中间件用法有些不一样, 回调的传入参数中的req和res,
-  // 并非原生的request对象和response对象,
-  // 而是框架内部封装过的,可通过origin属性访问原生的对象
-  use(fn = noop) {
-    if (typeof fn === 'function') {
-      this.#middlewares.push(fn)
-      return this
+  /**
+   * 加载中间件
+   * 与别的中间件用法有些不一样, 回调的传入参数中的req和res,
+   * 并非原生的request对象和response对象,
+   * 而是框架内部封装过的,可通过origin属性访问原生的对象
+   * @param {*} middleware
+   * @returns Five
+   */
+  use(middleware = noop, args) {
+    if (this.#online) {
+      return console.error('Server already started, cannot use middleware')
     }
-    throw TypeError('argument must be a function')
+    if (typeof middleware === 'function') {
+      this.#middlewares.push(middleware)
+    } else if (typeof middleware === 'object' && typeof middleware.install === 'function') {
+      this.#install(middleware, args)
+    } else {
+      throw TypeError('argument must be a function or installable object')
+    }
+    return this
   }
 
-  // 注入实例化对象到实例池中
-  // 与use方法不同的是, 这个会在server创建之前就已经执行
-  install({ name, install }, args) {
-    this['$$' + name] = install.call(this, args)
-    return this
+  /**
+   * 注入中间件, 与use方法不同, install方法会立即执行
+   * @deprecated 请使用use方法, 将在下个版本中移除
+   */
+  install(middleware, args) {
+    return this.#install(middleware, args)
   }
 
   // 预加载应用, 缓存以提高性能
@@ -128,12 +149,11 @@ class Five {
   }
 
   // 启动http服务
-  listen(port) {
+  listen(port = 3000, callback = noop) {
     this.set({ port })
-    return this
-  }
 
-  run() {
+    this.#online = true
+
     this.#server = http.createServer()
 
     // 路由中间件要在最后
@@ -151,14 +171,15 @@ class Five {
       .on('listening', _ => {
         if (this.get('debug')) {
           console.log('Server successfully started ...')
-          console.log('%s://%s:%d\n', 'http', '127.0.0.1', this.get('port'))
+          console.log('%s://%s:%d\n', 'http', '127.0.0.1', port)
         }
       })
       .on('error', err => {
         console.error(err)
       })
-      .listen(this.get('port'))
+      .listen(port)
 
+    callback.call(this, this.#server)
     return this
   }
 }
diff --git a/package.json b/package.json
index 4f41452..40d2c67 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,7 @@
   "description": "Five.js, 一个轻量级的nodejs mvc框架 旨在简单易用, 5分钟即可上手",
   "author": "yutent <yutent.io@gmail.com>",
   "main": "index.js",
+  "types": "index.d.ts",
   "dependencies": {
     "@gm5/session": "^2.0.0",
     "@gm5/request": "^2.0.3",