diff --git a/webapp/controller/ShopController.class.php b/webapp/controller/ShopController.class.php
index 2c1df301..7d897ef5 100644
--- a/webapp/controller/ShopController.class.php
+++ b/webapp/controller/ShopController.class.php
@@ -182,7 +182,7 @@ class ShopController extends BaseAuthedController {
             return;
         }
         if ($goodsMeta['shop_id'] != mt\Shop::OUTAPP_SHOP) {
-            $this->_rspErr(1, 'goods_num is invalid');
+            $this->_rspErr(1, 'config error shop_id');
             return;
         }
         if ($goodsMeta['token_type'] != mt\Shop::TOKEN_TYPE_USD) {
@@ -193,11 +193,11 @@ class ShopController extends BaseAuthedController {
             $this->_rspErr(1, 'config error price');
             return;
         }
-        if (!$fiat != 'USD') {
+        if ($fiat != 'USD') {
             $this->_rspErr(1, 'paramater error fiat');
             return;
         }
-        if (!$fiatAmount + 0.00001 < $goodsMeta['price']) {
+        if ($fiatAmount + 0.00001 < $goodsMeta['price']) {
             $this->_rspErr(1, 'paramater error fiatAmount');
             return;
         }