diff --git a/leopard-server/src/main/java/com/lanyuanxiaoyao/leopard/server/controller/TaskController.java b/leopard-server/src/main/java/com/lanyuanxiaoyao/leopard/server/controller/TaskController.java
index 0ac0a06..8e92c09 100644
--- a/leopard-server/src/main/java/com/lanyuanxiaoyao/leopard/server/controller/TaskController.java
+++ b/leopard-server/src/main/java/com/lanyuanxiaoyao/leopard/server/controller/TaskController.java
@@ -58,8 +58,10 @@ public class TaskController extends SimpleControllerSupport<Task, Void, TaskCont
   }
 
   private TaskCost calculateCost(LocalDateTime start, LocalDateTime finish) {
-    if (ObjectUtil.isNull(start) || ObjectUtil.isNull(finish)) {
+    if (ObjectUtil.isNull(start)) {
       return new TaskCost(null, null);
+    } else if (ObjectUtil.isNull(finish)) {
+      finish = LocalDateTime.now();
     }
     var duration = Duration.between(start, finish).toMillis();
     return new TaskCost(