diff --git a/webapp/controller/BagController.class.php b/webapp/controller/BagController.class.php
index 18df866a..37721fb8 100644
--- a/webapp/controller/BagController.class.php
+++ b/webapp/controller/BagController.class.php
@@ -330,17 +330,16 @@ class BagController extends BaseAuthedController {
     }
 
     private function openBox($itemDb,$itemMeta,$itemNum){
+
         $dropMeta = mt\Drop::get($itemMeta['drop']);
         if (!$dropMeta) {
             $this->_rspErr(1, 'config error');
             return;
         }
-        $costItems = array(
-            array(
-                "item_id" => V_ITEM_GOLD,
-                "item_num" => $itemMeta['gold'] * $itemNum
-            )
-        );
+        $costItems = mt\Item::getUseCostItems($itemMeta);
+        foreach ($costItems as &$costItem){
+            $costItem['item_num'] *= $itemNum;
+        }
         $lackItem = null;
         if (!$this->_hasEnoughItems($costItems, $lackItem)) {
             $this->_rspErr(3, $this->_getLackItemErrMsg($lackItem));