diff --git a/app/src/main/java/com/example/sprout/refactor/Constant.java b/app/src/main/java/com/example/sprout/refactor/Constant.java
index db1ca0a..91c9712 100644
--- a/app/src/main/java/com/example/sprout/refactor/Constant.java
+++ b/app/src/main/java/com/example/sprout/refactor/Constant.java
@@ -6,4 +6,6 @@
 
 public class Constant {
     public static final boolean DEVELOP = false;
+    public static final long ROOM_UPDATE_INTERVAL = 333; // ms
+    public static final long ROOM_UPDATE_DELAY = 50; // ms
 }
diff --git a/app/src/main/java/com/example/sprout/refactor/activity/RoomMainActivity.java b/app/src/main/java/com/example/sprout/refactor/activity/RoomMainActivity.java
index fbeb42d..8fbdd28 100644
--- a/app/src/main/java/com/example/sprout/refactor/activity/RoomMainActivity.java
+++ b/app/src/main/java/com/example/sprout/refactor/activity/RoomMainActivity.java
@@ -7,6 +7,7 @@
 import com.example.sprout.R;
 import com.example.sprout.Sprout;
 import com.example.sprout.databinding.RfActivityRoomMainBinding;
+import com.example.sprout.refactor.Constant;
 import com.example.sprout.refactor.adapter.RoomMainAdapter;
 import com.example.sprout.refactor.common.ActivityEvent;
 import com.example.sprout.refactor.contract.ViewContract;
@@ -30,7 +31,7 @@
     @Override
     protected void onResume() {
         super.onResume();
-        this.start(15, 500);
+        this.start(Constant.ROOM_UPDATE_DELAY, Constant.ROOM_UPDATE_INTERVAL);
     }
 
     @Override