diff --git a/module/dev/model.php b/module/dev/model.php
index 12f19a617b..07dd8e0cf2 100644
--- a/module/dev/model.php
+++ b/module/dev/model.php
@@ -512,6 +512,10 @@ class devModel extends model
      */
     public function loadDefaultLang($language = 'zh-cn', $module = 'common')
     {
+        if(empty($language)) $language = 'zh-cn';
+        if(empty($module))   $module = 'common';
+        if($module != 'common' and !isset($this->defaultLang)) return null;
+
         $clientLang = $this->app->clientLang;
         if($language and $language != $clientLang) $this->app->clientLang = $language;
 
diff --git a/test/model/dev/loaddefaultlang.php b/test/model/dev/loaddefaultlang.php
new file mode 100644
index 0000000000..7beb64f721
--- /dev/null
+++ b/test/model/dev/loaddefaultlang.php
@@ -0,0 +1,25 @@
+#!/usr/bin/env php
+<?php
+include dirname(dirname(dirname(__FILE__))) . '/lib/init.php';
+include dirname(dirname(dirname(__FILE__))) . '/class/dev.class.php';
+
+/**
+
+title=测试 devModel::loadDefaultLang();
+cid=1
+pid=1
+
+检查没有传值的情况    >> $URCOMMON
+检查传入common的情况  >> $PRODUCTCOMMON
+检查传入project的情况 >> 0
+
+*/
+
+
+$moduleList     = array('common', 'project');
+
+global $tester;
+$tester->loadModel('dev');
+r($tester->dev->loadDefaultLang())                        && p('URCommon')      && e('$URCOMMON');      // 检查没有传值的情况
+r($tester->dev->loadDefaultLang('zh-cn', $moduleList[0])) && p('productCommon') && e('$PRODUCTCOMMON'); // 检查传入common的情况
+r($tester->dev->loadDefaultLang('zh-cn', $moduleList[1])) && p()                && e('0');              // 检查传入project的情况