diff --git a/src/main/java/com/loafle/overflow/service/central/target/TargetService.java b/src/main/java/com/loafle/overflow/service/central/target/TargetService.java
index 129051f..0d6e9a3 100644
--- a/src/main/java/com/loafle/overflow/service/central/target/TargetService.java
+++ b/src/main/java/com/loafle/overflow/service/central/target/TargetService.java
@@ -9,15 +9,15 @@ import com.loafle.overflow.model.target.Target;
  * Created by insanity on 17. 6. 28.
  */
 public interface TargetService {
+
+    public Target regist(Target target, Probe probe) throws OverflowException;
+    public void remove(Target target, Probe probe) throws OverflowException;
+    public Target read(String id) throws OverflowException;
+    public Target increaseSensorCount(Target target) throws OverflowException;
+    public Target decreaseSensorCount(Target target) throws OverflowException;
+    
     @WebappAPI
-    Target regist(Target target) throws OverflowException;
-    @WebappAPI
-    Target read(String id) throws OverflowException;
+    public Target modify(Target target) throws OverflowException;
     @WebappAPI
     void remove(Target target) throws OverflowException;
-
-    @WebappAPI
-    public Target regist(Target target, Probe probe) throws OverflowException;
-    @WebappAPI
-    public Target remove(Target target, Probe probe) throws OverflowException;
 }