diff --git a/Controllers/AuthApiController.cs b/Controllers/AuthApiController.cs
index 870d073b..34e0850e 100644
--- a/Controllers/AuthApiController.cs
+++ b/Controllers/AuthApiController.cs
@@ -152,6 +152,10 @@ namespace QuotationMaker.Controllers
 
                     modelMainItem newModelMainItem = new modelMainItem();
 
+                    if (modelMainItem_ac == "") {
+                        modelMainItem_ac = "0";
+                    }
+
                     newModelMainItem.mainItem_uid = mainItem_uid;
                     newModelMainItem.modelMainItem_uid = modelMainItem_uid;
                     newModelMainItem.modelMainItem_name = modelMainItem_name;
diff --git a/wwwroot/assets/javascript/custom/modallist.js b/wwwroot/assets/javascript/custom/modallist.js
index 686185a4..69085bab 100644
--- a/wwwroot/assets/javascript/custom/modallist.js
+++ b/wwwroot/assets/javascript/custom/modallist.js
@@ -262,13 +262,20 @@ $(document).ready(function () {
         var mainItem_uid = $('#parent_mainItem_uid').val();
         var method = $('#modelMainItem_method').val();
         var modelMainItem_name = $('#modelMainItem_name').val();
-        var modelMainItem_ac = $('#modelMainItem_ac').val();
+        var modelMainItem_ac = $('#modelMainItem_ac').val().replace(/,/g, "");;
+
+
+
 
         if (modelMainItem_ac.isNumber() == false) {
             alert('AC必須為數字!');
             return;
         }
 
+        if (modelMainItem_ac == "") {
+            modelMainItem_ac = "0";
+        }
+
         if (modelMainItem_name == "") {
             alert('主項目名稱不得為空白!');
             return;