diff --git a/src/main/java/com/cloudcomputing/ohhanahana/dto/response/SensorDataResponse.java b/src/main/java/com/cloudcomputing/ohhanahana/dto/response/SensorDataResponse.java
index 9b42381..a20f6a2 100644
--- a/src/main/java/com/cloudcomputing/ohhanahana/dto/response/SensorDataResponse.java
+++ b/src/main/java/com/cloudcomputing/ohhanahana/dto/response/SensorDataResponse.java
@@ -16,12 +16,12 @@ public class SensorDataResponse {
     private String currentLocation;
     private String currentDateTime;
     private Congestion congestion;
-    private String expectedWaitingTime;
+    private int expectedWaitingTime;
     private String expectedWaitingPeople;
 
     public static SensorDataResponse toDTO(String currentLocation, String currentDateTime,
         Congestion congestion,
-        String expectedWaitingTime, String expectedWaitingPeople) {
+        int expectedWaitingTime, String expectedWaitingPeople) {
 
         return SensorDataResponse.builder()
             .currentLocation(currentLocation)
diff --git a/src/main/java/com/cloudcomputing/ohhanahana/service/SensorDataService.java b/src/main/java/com/cloudcomputing/ohhanahana/service/SensorDataService.java
index e572ce3..80b809f 100644
--- a/src/main/java/com/cloudcomputing/ohhanahana/service/SensorDataService.java
+++ b/src/main/java/com/cloudcomputing/ohhanahana/service/SensorDataService.java
@@ -99,22 +99,22 @@ private Congestion determineCongestion(int sensor1Value, int sensor2Value, int s
         }
     }
 
-    private String calculateWaitingTime(Congestion congestion) throws JAXBException {
+    private int calculateWaitingTime(Congestion congestion) throws JAXBException {
         int remain511Minute = busService.get511BusRemainMinute();
 
         return switch (congestion) {
-            case SPARE -> remain511Minute + "분";
-            case NORMAL -> remain511Minute + 5 + "분";
-            case CONGESTION -> remain511Minute + 10 + "분";
-            default -> "-";
+            case SPARE -> remain511Minute;
+            case NORMAL -> remain511Minute;
+            case CONGESTION -> remain511Minute + 10;
+            default -> 0;
         };
     }
 
     private String calculatePeople(Congestion congestion) {
         return switch (congestion) {
-            case SPARE -> "15명";
-            case NORMAL -> "25명";
-            case CONGESTION -> "35명";
+            case SPARE -> "15";
+            case NORMAL -> "25";
+            case CONGESTION -> "35";
             default -> "-";
         };
     }