diff --git a/app/api/controller/IndexController.php b/app/api/controller/IndexController.php
index afd5dd81..aa9a1073 100644
--- a/app/api/controller/IndexController.php
+++ b/app/api/controller/IndexController.php
@@ -70,8 +70,8 @@ class IndexController extends BaseApiController
                     'create_time' => $landCollection['create_time']
 				];
                 $monitorThreshold = MonitorThreshold::select();
-				if($monitorThreshold){
-					$monitorThreshold=$monitorThreshold->toArray()[0];
+				if($monitorThreshold->toArray()!=null){
+					$monitorThreshold=$monitorThreshold[0];
 				}else{
 					$monitorThreshold=[];
 				}