diff --git a/src/main/java/calculator/controller/CalculatorController.java b/src/main/java/calculator/controller/CalculatorController.java
index 455af28aa5..6532bf8816 100644
--- a/src/main/java/calculator/controller/CalculatorController.java
+++ b/src/main/java/calculator/controller/CalculatorController.java
@@ -17,7 +17,7 @@ public void input() {
     }
 
     private void output(String s) {
-        int sum = calculatorService.sum(s);
+        int sum = calculatorService.add(s);
         System.out.println("결과 : " + sum);
     }
 
diff --git a/src/main/java/calculator/service/CalculatorService.java b/src/main/java/calculator/service/CalculatorService.java
index 28442b528a..6f5ab39132 100644
--- a/src/main/java/calculator/service/CalculatorService.java
+++ b/src/main/java/calculator/service/CalculatorService.java
@@ -9,7 +9,7 @@ public class CalculatorService {
     /**
      * 덧셈 로직을 순차적으로 진행한다.
      */
-    public int sum(String s) {
+    public int add(String s) {
         this.s = s;
         boolean hasCustomSeparator = checkCustomSeparator();
         String[] separatedString = separate(hasCustomSeparator);