diff --git a/.gitignore b/.gitignore
index c8e964aa..70fe63f2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 .sass-cache
 vendor/*
 storage/textures/*
+storage/update_cache/*
 node_modules/*
 resources/assets/src/bower_components/*
 koala-config.json
diff --git a/app/Http/Controllers/UpdateController.php b/app/Http/Controllers/UpdateController.php
index 833a855b..49d1ac87 100644
--- a/app/Http/Controllers/UpdateController.php
+++ b/app/Http/Controllers/UpdateController.php
@@ -5,6 +5,7 @@ namespace App\Http\Controllers;
 use Arr;
 use Log;
 use Utils;
+use ZipArchive;
 use App\Services\Storage;
 use Illuminate\Http\Request;
 
@@ -140,7 +141,43 @@ class UpdateController extends Controller
                 break;
 
             case 'extract':
-                //
+
+                if (!file_exists($tmp_path)) exit('No file available');
+
+                $extract_dir = storage_path("update_cache/{$this->latestVersion}");
+
+                $zip = new ZipArchive();
+                $res = $zip->open($tmp_path);
+
+                if ($res === true) {
+                    Log::info("[ZipArchive] Extracting file $tmp_path");
+
+                    try {
+                        $zip->extractTo($extract_dir);
+                    } catch (\Exception $e) {
+                        exit('发生错误：'.$e->getMessage());
+                    }
+
+                } else {
+                    exit('更新包解压缩失败。错误代码：'.$res);
+                }
+                $zip->close();
+
+                if (Storage::copyDir($extract_dir, base_path()) !== true) {
+
+                    Storage::removeDir(storage_path('update_cache'));
+                    exit('无法覆盖文件。');
+
+                } else {
+
+                   Log::info("[Extracter] Covering files");
+                   Storage::removeDir(storage_path('update_cache'));
+
+                   Log::info("[Extracter] Cleaning cache");
+                }
+
+                return json('更新完成', 0);
+
                 break;
 
             default:
diff --git a/app/Services/Storage.php b/app/Services/Storage.php
index aad521f8..105656d9 100644
--- a/app/Services/Storage.php
+++ b/app/Services/Storage.php
@@ -70,7 +70,7 @@ class Storage
         $size = 0;
         while($filename = @readdir($resource)) {
             if ($filename != "." && $filename != "..") {
-                $path = $dir.$filename;
+                $path = "$dir/$filename";
                 if (is_dir($path)) {
                     // recursion
                     self::removeDir($path."/");
@@ -96,7 +96,7 @@ class Storage
         $size = 0;
         while($filename = @readdir($resource)) {
             if ($filename != "." && $filename != "..") {
-                $path = $dir.$filename;
+                $path = "$dir/$filename";
                 if (is_dir($path)) {
                     // recursion
                     $size += self::getDirSize($path);
@@ -121,7 +121,7 @@ class Storage
         $resource = opendir($dir);
         while($filename = readdir($resource)) {
             if ($filename != "." && $filename != "..") {
-                $path = $dir.$filename;
+                $path = "$dir/$filename";
                 if (is_dir($path)) {
                     // recursion
                     $file_num = self::getFileNum($path, $file_num);
diff --git a/resources/assets/src/js/admin.js b/resources/assets/src/js/admin.js
index 99d01b30..45915e7b 100644
--- a/resources/assets/src/js/admin.js
+++ b/resources/assets/src/js/admin.js
@@ -2,7 +2,7 @@
  * @Author: printempw
  * @Date:   2016-07-22 14:02:44
  * @Last Modified by:   printempw
- * @Last Modified time: 2016-11-25 12:45:28
+ * @Last Modified time: 2016-11-25 13:10:36
  */
 
 'use strict';
@@ -353,17 +353,33 @@ function downloadUpdates() {
 
         var interval_id = window.setInterval(function() {
 
+            $('#imported-progress').html(progress);
+            $('.progress-bar').css('width', progress+'%').attr('aria-valuenow', progress);
+
             if (progress == 100) {
                 clearInterval(interval_id);
 
-                $('#modal-start-download').modal('toggle');
+                toastr.success('正在解压更新包');
+
+                console.log("Start extracting");
+                $.ajax({
+                    url: './update/download?action=extract',
+                    type: 'POST',
+                    dataType: 'json'
+                })
+                .done(function(json) {
+                    console.log("Files covered");
+                    $('#modal-start-download').modal('toggle');
+
+                    swal({
+                        type: 'success',
+                        html: json.msg
+                    }).then(function() {
+                        window.location = "../";
+                    });
+                })
+                .fail(showAjaxError);
 
-                swal({
-                    type: 'success',
-                    html: '下载完成！'
-                }).then(function(new_name) {
-                    //
-                });
             } else {
                 $.ajax({
                     url: './update/download?action=get-file-size',
@@ -372,9 +388,6 @@ function downloadUpdates() {
                 .done(function(json) {
                     progress = (json.size / file_size * 100).toFixed(2);
 
-                    $('#imported-progress').html(progress);
-                    $('.progress-bar').css('width', progress+'%').attr('aria-valuenow', progress);
-
                     console.log("Progress: "+progress);
                 })
                 .fail(showAjaxError);
diff --git a/storage/update_cache/.gitignore b/storage/update_cache/.gitignore
deleted file mode 100644
index d6b7ef32..00000000
--- a/storage/update_cache/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-*
-!.gitignore