diff --git a/Backend/Controllers/MybaseController.cs b/Backend/Controllers/MybaseController.cs
index 4cb7fb4..6db4590 100644
--- a/Backend/Controllers/MybaseController.cs
+++ b/Backend/Controllers/MybaseController.cs
@@ -95,7 +95,8 @@ namespace Backend.Controllers
                 { "@created_by", myUserInfo.Userinfo_guid}
             };
 
-            backendRepository.InsertOperatorLog(operatorLog, "operation_back_log");
+            if (actionName != "CompareData" && controllerName != "NiagaraDataSynchronize") //skip the log
+                backendRepository.InsertOperatorLog(operatorLog, "operation_back_log");
 
             //operatorLogRepository.Add(operatorLog, properties);
             #endregion
diff --git a/Backend/Controllers/NiagaraDataSynchronizeController.cs b/Backend/Controllers/NiagaraDataSynchronizeController.cs
index 8209ed9..692f525 100644
--- a/Backend/Controllers/NiagaraDataSynchronizeController.cs
+++ b/Backend/Controllers/NiagaraDataSynchronizeController.cs
@@ -8,6 +8,7 @@ using Microsoft.Extensions.Logging;
 using Backend.Services;
 using Backend.Services.Implement;
 using Repository.Models;
+using System.Linq;
 
 namespace Backend.Controllers
 {
@@ -69,13 +70,14 @@ namespace Backend.Controllers
         /// </summary>
         /// <returns></returns>
         [HttpPost]
-        public async Task<ApiResult<bool>> CompareData(List<Device_value> ds, string building)
+        public async Task<ApiResult<bool>> CompareData([FromBody] List<Device_value> ds)
         {
             bool result = false;
+
             ApiResult<bool> apiResult = new ApiResult<bool>();
             try
             {
-                
+                var building = ds.FirstOrDefault().building;
                 await niagaraDataSynchronizeRepository.InsertNiagaraTagList(ds, building);
                 await niagaraDataSynchronizeRepository.InsertItemFromNiagara(ds, building);
                 await niagaraDataSynchronizeRepository.DeviceComparison();
diff --git a/Backend/Views/NiagaraDataSynchronize/Index.cshtml b/Backend/Views/NiagaraDataSynchronize/Index.cshtml
index ac25e57..75ccf70 100644
--- a/Backend/Views/NiagaraDataSynchronize/Index.cshtml
+++ b/Backend/Views/NiagaraDataSynchronize/Index.cshtml
@@ -144,20 +144,29 @@
                 //比對資料，有差異的話，再同步到device等資料表
                 var url_synchronize_data = "/NiagaraDataSynchronize/CompareData/";
 
-                var send_data = {
-                    ds: ds,
-                    building: building
-                }
-                $.post(url_synchronize_data, send_data, function (rel) {
-                    if (rel.code != "0000") {
-                        toast_error(rel.msg);
-                        document.getElementById('loadDataText').innerText = "比對資料出錯了!";
-                        return;
-                    }
-                    var time = today.getHours() + ":" + today.getMinutes() + ":" + today.getSeconds();
-                    var dateTime = date + ' ' + time;
-                    document.getElementById('loadDataText').innerText = "比對完成 \n" + dateTime;
-                }, 'json');
+                $.each(ds, function (i, v) {
+                    v.building = building;
+                })
+
+                $.ajax({
+                    method: "POST",
+                    url: url_synchronize_data,
+                    data: JSON.stringify(ds),
+                    cache: false,
+                    async: false,
+                    contentType: "application/json; charset=UTF-8",
+                    dataType: 'json',
+                    success: function (rel) {
+                        if (rel.code != "0000") {
+                            toast_error(rel.msg);
+                            document.getElementById('loadDataText').innerText = "比對資料出錯了!";
+                            return;
+                        }
+                        var time = today.getHours() + ":" + today.getMinutes() + ":" + today.getSeconds();
+                        var dateTime = date + ' ' + time;
+                        document.getElementById('loadDataText').innerText = "比對完成 \n" + dateTime;
+                    },
+                });
             }
             else {
                 document.getElementById('loadDataText').innerText = "查無資料 無法比對！";
diff --git a/Repository/BackendRepository/Implement/NiagaraDataSynchronizeRepository.cs b/Repository/BackendRepository/Implement/NiagaraDataSynchronizeRepository.cs
index 18e2e45..9522f55 100644
--- a/Repository/BackendRepository/Implement/NiagaraDataSynchronizeRepository.cs
+++ b/Repository/BackendRepository/Implement/NiagaraDataSynchronizeRepository.cs
@@ -10,7 +10,6 @@ using System.Threading.Tasks;
 using System.Transactions;
 using Repository.Models;
 
-
 namespace Repository.BackendRepository.Implement
 {
     public class NiagaraDataSynchronizeRepository : BackendRepository, INiagaraDataSynchronizeRepository
@@ -389,15 +388,22 @@ namespace Repository.BackendRepository.Implement
                         {
                             foreach (var data in result)
                             {
+                                StringBuilder sqlString = new StringBuilder();
+                                sqlString.Append(@"select * from building_menu where building_tag = '" + data.device_building_tag + "' and main_system_tag = '" + data.device_system_tag + "' and sub_system_tag = '" + data.device_name_tag + "'");
+                                var bm = (await conn.QueryAsync<building_menu>(sqlString.ToString())).ToList<building_menu>();
+
                                 #region insert building_menu
-                                sb.Append(@"insert building_menu(building_tag, main_system_tag, sub_system_tag, device_building_tag, device_system_tag,
-                              is_link, created_by, created_at, updated_by, updated_at)
-                              VALUES ('" + data.device_building_tag + "', '" +
-                                      data.device_system_tag + "', '" +
-                                      data.device_name_tag + "', '" +
-                                      data.device_building_tag + "', '" +
-                                      data.device_system_tag + "', " +
-                                      "1, 'B43E3CA7-96DD-4FC7-B6E6-974ACC3B0878', now(), 'B43E3CA7-96DD-4FC7-B6E6-974ACC3B0878', now() );");
+                                if (bm.Count == 0)
+                                {
+                                    sb.Append(@"insert building_menu(building_tag, main_system_tag, sub_system_tag, device_building_tag, device_system_tag,
+                                  is_link, created_by, created_at, updated_by, updated_at)
+                                  VALUES ('" + data.device_building_tag + "', '" +
+                                          data.device_system_tag + "', '" +
+                                          data.device_name_tag + "', '" +
+                                          data.device_building_tag + "', '" +
+                                          data.device_system_tag + "', " +
+                                          "1, 'B43E3CA7-96DD-4FC7-B6E6-974ACC3B0878', now(), 'B43E3CA7-96DD-4FC7-B6E6-974ACC3B0878', now() );");
+                                }
                                 #endregion
                             }
                             if (sb.Length > 0)
diff --git a/Repository/Models/BackgroundServiceTask.cs b/Repository/Models/BackgroundServiceTask.cs
index fafd4d4..d81f8d6 100644
--- a/Repository/Models/BackgroundServiceTask.cs
+++ b/Repository/Models/BackgroundServiceTask.cs
@@ -47,6 +47,7 @@ namespace Repository.Models
         public string value { get; set; }
         public string tag_name { get; set; }
         public string point_name { get; set; }
+        public string building { get; set; }
     }
 
     public class Device_item8
@@ -93,4 +94,10 @@ namespace Repository.Models
         public string device_point_name { get; set; }
     }
 
+    public class building_menu
+    {
+        public string building_tag { get; set; }
+        public string device_system_tag { get; set; }
+        public string device_name_tag { get; set; }
+    }
 }