diff --git a/src/main/java/com/backend/glowhouse/repository/UserRepositoryCustom.java b/src/main/java/com/backend/glowhouse/repository/UserRepositoryCustom.java
new file mode 100644
index 0000000000000000000000000000000000000000..e4d2ce4e7170642574ac600f7cfdaca6e1935c79
--- /dev/null
+++ b/src/main/java/com/backend/glowhouse/repository/UserRepositoryCustom.java
@@ -0,0 +1,7 @@
+package com.backend.glowhouse.repository;
+
+import com.backend.glowhouse.model.Device;
+
+public interface UserRepositoryCustom {
+    public boolean updateUserAssignDevice(String username, Device device);
+}
diff --git a/src/main/java/com/backend/glowhouse/repository/UserRepositoryImpl.java b/src/main/java/com/backend/glowhouse/repository/UserRepositoryImpl.java
new file mode 100644
index 0000000000000000000000000000000000000000..06e63b23645d2ab1f5c7c671491dc882ffed9bfa
--- /dev/null
+++ b/src/main/java/com/backend/glowhouse/repository/UserRepositoryImpl.java
@@ -0,0 +1,32 @@
+package com.backend.glowhouse.repository;
+
+import com.backend.glowhouse.model.Device;
+import com.backend.glowhouse.model.User;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.mongodb.core.MongoTemplate;
+import org.springframework.data.mongodb.core.query.Criteria;
+import org.springframework.data.mongodb.core.query.Query;
+import org.springframework.data.mongodb.core.query.Update;
+
+
+public class UserRepositoryImpl implements UserRepositoryCustom{
+    private final MongoTemplate mongoTemplate;
+
+    @Autowired
+    public  UserRepositoryImpl(MongoTemplate mongoTemplate) {
+        this.mongoTemplate = mongoTemplate;
+    }
+
+    @Override
+    public boolean updateUserAssignDevice(String username, Device device) {
+        Query query = new Query();
+        query.addCriteria(Criteria.where("username").is(username));
+
+        Update update = new Update()
+                .set("device", device);
+
+        mongoTemplate.updateFirst(query, update, User.class);
+
+        return true;
+    }
+}