diff --git a/js/mvvm.js b/js/mvvm.js
index b37a2d55..4f9d6a86 100644
--- a/js/mvvm.js
+++ b/js/mvvm.js
@@ -5,10 +5,16 @@ function MVVM(options) {
 
     // 数据代理
     // 实现 vm.xxx -> vm._data.xxx
-    Object.keys(data).forEach(function(key) {
+    Object.keys(data).forEach(function (key) {
         me._proxyData(key);
     });
 
+    // 代理methods
+    // 实现 vm.xxx -> vm.options.methods.xxx
+    Object.keys(me.$options.methods).forEach(function (key) {
+        me._proxyAttribute(key, me.$options.methods, me)
+    });
+
     this._initComputed();
 
     observe(data, this);
@@ -18,35 +24,54 @@ function MVVM(options) {
 
 MVVM.prototype = {
     constructor: MVVM,
-    $watch: function(key, cb, options) {
+    $watch: function (key, cb, options) {
         new Watcher(this, key, cb);
     },
 
-    _proxyData: function(key, setter, getter) {
+    _proxyData: function (key, setter, getter) {
         var me = this;
-        setter = setter || 
-        Object.defineProperty(me, key, {
-            configurable: false,
-            enumerable: true,
-            get: function proxyGetter() {
-                return me._data[key];
-            },
-            set: function proxySetter(newVal) {
-                me._data[key] = newVal;
-            }
-        });
+        setter = setter ||
+            Object.defineProperty(me, key, {
+                configurable: false,
+                enumerable: true,
+                get: function proxyGetter() {
+                    return me._data[key];
+                },
+                set: function proxySetter(newVal) {
+                    me._data[key] = newVal;
+                }
+            });
     },
 
-    _initComputed: function() {
+     /**
+      * 
+      * @param {*} key source的一个要被代理的属性名
+      * @param {*} source  source的各个属性被代理到target
+      * @param {*} target  target[key] 可以访问到source[key]
+      */
+     _proxyAttribute: function (key, source, target) {
+         Object.defineProperty(target, key, {
+             configurable: false,
+             enumerable: false,
+             get: function proxyGetter() {
+                 return source[key];
+             },
+             set: function proxySetter(newVal) {
+                 source[key] = newVal;
+             }
+         });
+     },
+
+    _initComputed: function () {
         var me = this;
         var computed = this.$options.computed;
         if (typeof computed === 'object') {
-            Object.keys(computed).forEach(function(key) {
+            Object.keys(computed).forEach(function (key) {
                 Object.defineProperty(me, key, {
-                    get: typeof computed[key] === 'function' 
-                            ? computed[key] 
-                            : computed[key].get,
-                    set: function() {}
+                    get: typeof computed[key] === 'function' ?
+                        computed[key] :
+                        computed[key].get,
+                    set: function () {}
                 });
             });
         }