diff --git a/nezha-fronted/src/components/charts/chart-alert-list.vue b/nezha-fronted/src/components/charts/chart-alert-list.vue
index 0f4950291..e1b7e5455 100644
--- a/nezha-fronted/src/components/charts/chart-alert-list.vue
+++ b/nezha-fronted/src/components/charts/chart-alert-list.vue
@@ -504,7 +504,7 @@ export default {
         },
       formatThreshold:function(value,unit){
         let unitMethod=chartDataFormat.getUnit(unit)
-        if(unitMethod&&unit.compute){
+        if(unitMethod&&value){
           return unitMethod.compute(value,null,2);
         }else{
           return value
diff --git a/nezha-fronted/src/components/page/alert/config.vue b/nezha-fronted/src/components/page/alert/config.vue
index 2dfa6387d..c4f44f8bc 100644
--- a/nezha-fronted/src/components/page/alert/config.vue
+++ b/nezha-fronted/src/components/page/alert/config.vue
@@ -355,7 +355,7 @@
       },
       formatThreshold:function(value,unit){
         let unitMethod=chartDataFormat.getUnit(unit)
-        if(unitMethod&&unit.compute){
+        if(unitMethod&&value){
           return unitMethod.compute(value,null,2);
         }else{
           return value
diff --git a/nezha-fronted/src/components/page/alert/list.vue b/nezha-fronted/src/components/page/alert/list.vue
index e87823841..8eed75afa 100644
--- a/nezha-fronted/src/components/page/alert/list.vue
+++ b/nezha-fronted/src/components/page/alert/list.vue
@@ -485,7 +485,7 @@
       },
       formatThreshold:function(value,unit){
         let unitMethod=chartDataFormat.getUnit(unit)
-        if(unitMethod&&unit.compute){
+        if(unitMethod&&value){
           return unitMethod.compute(value,null,2);
         }else{
           return value
@@ -603,7 +603,7 @@
                     }
                   });
                 }else{
-                  current=['','']
+                  current=[null,null]
                 }
                 this.$set(item, "current", current);
               });