diff --git a/admin/admin_ajax.php b/admin/admin_ajax.php
index af1ce3c2..26f579fb 100644
--- a/admin/admin_ajax.php
+++ b/admin/admin_ajax.php
@@ -3,7 +3,7 @@
  * @Author: prpr
  * @Date:   2016-02-04 13:53:55
  * @Last Modified by:   prpr
- * @Last Modified time: 2016-02-04 17:14:06
+ * @Last Modified time: 2016-02-04 18:09:26
  */
 session_start();
 $dir = dirname(dirname(__FILE__));
@@ -61,6 +61,16 @@ if (isset($_GET['action'])) {
         $user->unRegister();
         $json['errno'] = 0;
         $json['msg'] = "Account successfully deleted.";
+    } else if ($action == "model") {
+        if (isset($_POST['model']) && $_POST['model'] == 'slim' || $_POST['model'] == 'default') {
+            $user->setPreference($_POST['model']);
+            $json['errno'] = 0;
+            $json['msg'] = "Model preference of ".$_GET['uname']." changed to ".$_POST['model']." successfully.";
+        } else {
+            utils::raise(1, 'Illegal parameters');
+        }
+    } else {
+        utils::raise(1, 'Illegal parameters');
     }
 }
 
diff --git a/admin/index.php b/admin/index.php
index 18a02534..ff01b33b 100644
--- a/admin/index.php
+++ b/admin/index.php
@@ -3,7 +3,7 @@
  * @Author: prpr
  * @Date:   2016-02-03 14:39:50
  * @Last Modified by:   prpr
- * @Last Modified time: 2016-02-04 17:32:11
+ * @Last Modified time: 2016-02-04 18:08:41
  */
 
 session_start();
@@ -88,8 +88,10 @@ if (isset($_SESSION['uname'])) {
                     <?php echo '<img id="'.$row['username'].'_cape" width="64" '.(($row['cape_hash'] == "") ? '' : 'src="../cape/'.$row['username'].'.png"').'/>'; ?>
                 </td>
                 <td>
-                    <a href="javascript:showUpload('<?php echo $row['username'] ?>', 'skin');" class="pure-button pure-button-primary">Skin</a>
-                    <a href="javascript:showUpload('<?php echo $row['username'] ?>', 'cape');" class="pure-button pure-button-primary">Cape</a>
+                    <a href="javascript:showUpload('<?php echo $row['username']; ?>', 'skin');" class="pure-button pure-button-primary">Skin</a>
+                    <a href="javascript:showUpload('<?php echo $row['username']; ?>', 'cape');" class="pure-button pure-button-primary">Cape</a>
+                    <a href="javascript:showModel('<?php echo $row['username']; ?>', 'cape');" class="pure-button pure-button-default">Model</a>
+                    <span>(<?php echo $row['preference']; ?>)</span>
                 </td>
                 <td>
                     <a href="javascript:showChange('<?php echo $row['username'] ?>');" class="pure-button pure-button-default">Password</a>
diff --git a/assets/js/admin.utils.js b/assets/js/admin.utils.js
index abc01778..4c72d753 100644
--- a/assets/js/admin.utils.js
+++ b/assets/js/admin.utils.js
@@ -2,7 +2,7 @@
 * @Author: prpr
 * @Date:   2016-02-04 16:48:42
 * @Last Modified by:   prpr
-* @Last Modified time: 2016-02-04 17:09:20
+* @Last Modified time: 2016-02-04 18:02:38
 */
 
 'use strict';
@@ -83,3 +83,29 @@ function showDelete(uname) {
         });
     });
 }
+
+function showModel(uname) {
+    Ply.dialog("prompt", {
+        title: "Change "+uname+"'s model prefrence:",
+        form: { text: "Type in `slim` or `default`" }
+    }).done(function(ui){
+        var model = ui.data.text;
+        if (model == 'slim'| model == 'default') {
+            $.ajax({
+                type: "POST",
+                url: "admin_ajax.php?action=model&uname="+uname,
+                data: { "model": ui.data.text },
+                dataType: "json",
+                success: function(json) {
+                    if (json.errno == 0) {
+                        showAlert(json.msg);
+                    } else {
+                        showAlert(json.msg);
+                    }
+                }
+            });
+        } else {
+            showAlert('Only `slim` or `default` is valid.');
+        }
+    });
+}