diff --git a/src/main/java/com/seeme/service/MicrodustService.java b/src/main/java/com/seeme/service/MicrodustService.java
index 7d5169c..c3b3c65 100644
--- a/src/main/java/com/seeme/service/MicrodustService.java
+++ b/src/main/java/com/seeme/service/MicrodustService.java
@@ -3,7 +3,7 @@
 import com.seeme.domain.ResDto;
 import com.seeme.domain.microdust.*;
 import com.seeme.service.api.MicrodustOpenApi;
-import com.seeme.util.ErrorMessage;
+import com.seeme.util.ErrorMessageUtil;
 import com.seeme.util.MicrodustUtil;
 import lombok.AllArgsConstructor;
 import org.json.simple.parser.ParseException;
@@ -34,7 +34,7 @@ public MicrodustMainResDto getMain(List<String> measuringStationList) {
 			e.printStackTrace();
 			ResDto resDto = ResDto.builder()
 				.resultCode(500)
-				.errorMessage(ErrorMessage.JSON_PARSING_ERROR)
+				.errorMessage(ErrorMessageUtil.JSON_PARSING_ERROR)
 				.document(null)
 				.build();
 			return MicrodustMainResDto.builder()
@@ -43,7 +43,7 @@ public MicrodustMainResDto getMain(List<String> measuringStationList) {
 			e.printStackTrace();
 			ResDto resDto = ResDto.builder()
 				.resultCode(500)
-				.errorMessage(ErrorMessage.UNKNOWN_ERROR)
+				.errorMessage(ErrorMessageUtil.UNKNOWN_ERROR)
 				.document(null)
 				.build();
 
@@ -81,7 +81,7 @@ private ResDto getMainResDto(List<Microdust> microdustList) {
 
 		return ResDto.builder()
 			.resultCode(200)
-			.errorMessage(ErrorMessage.SUCCESS)
+			.errorMessage(ErrorMessageUtil.SUCCESS)
 			.document(MicrodustResDto.builder()
 				.pm10Flag(pm10Flag)
 				.pm25Flag(pm25Flag)
@@ -103,7 +103,7 @@ private ResDto getTotalResDto(List<Microdust> microdustList) {
 
 				return ResDto.builder()
 					.resultCode(200)
-					.errorMessage(ErrorMessage.SUCCESS)
+					.errorMessage(ErrorMessageUtil.SUCCESS)
 					.document(MicrodustTotalResDto.builder()
 						.pm10(Double.parseDouble(microdust.getPm10Value())).pm10Flag(true)
 						.pm25(Double.parseDouble(microdust.getPm25Value())).pm25Flag(true)
@@ -120,7 +120,7 @@ private ResDto getTotalResDto(List<Microdust> microdustList) {
 		Microdust microdust = microdustList.get(0);
 		return ResDto.builder()
 			.resultCode(200)
-			.errorMessage(ErrorMessage.SUCCESS)
+			.errorMessage(ErrorMessageUtil.SUCCESS)
 			.document(MicrodustTotalResDto.builder()
 				.pm10(MicrodustUtil.getDouble(microdust.getPm10Value()))
 				.pm10Flag(MicrodustUtil.getBool(microdust.getPm10Value()))
@@ -156,7 +156,7 @@ private ResDto getMaskResDto(List<Microdust> microdustList) {
 
 		return ResDto.builder()
 			.resultCode(200)
-			.errorMessage(null)
+			.errorMessage("SUCCESS")
 			.document(MicrodustMaskResDto.builder()
 				.maskIcon(maskIcon)
 				.desc(desc)
diff --git a/src/main/java/com/seeme/service/WeatherService.java b/src/main/java/com/seeme/service/WeatherService.java
index 5168284..6a6d342 100644
--- a/src/main/java/com/seeme/service/WeatherService.java
+++ b/src/main/java/com/seeme/service/WeatherService.java
@@ -3,7 +3,7 @@
 import com.seeme.domain.ResDto;
 import com.seeme.domain.weather.*;
 import com.seeme.service.api.WeatherOpenApi;
-import com.seeme.util.ErrorMessage;
+import com.seeme.util.ErrorMessageUtil;
 import com.seeme.util.WeatherUtil;
 import lombok.AllArgsConstructor;
 import org.springframework.stereotype.Service;
@@ -42,7 +42,7 @@ public WeatherMainResDto getMain(Double lat, Double lon) {
 			e.printStackTrace();
 			ResDto resDto = ResDto.builder()
 				.resultCode(500)
-				.errorMessage(ErrorMessage.JSON_PARSING_ERROR)
+				.errorMessage(ErrorMessageUtil.JSON_PARSING_ERROR)
 				.document(null)
 				.build();
 			return WeatherMainResDto.builder()
@@ -51,7 +51,7 @@ public WeatherMainResDto getMain(Double lat, Double lon) {
 			e.printStackTrace();
 			ResDto resDto = ResDto.builder()
 				.resultCode(500)
-				.errorMessage(ErrorMessage.UNKNOWN_ERROR)
+				.errorMessage(ErrorMessageUtil.UNKNOWN_ERROR)
 				.document(null)
 				.build();
 			return WeatherMainResDto.builder()
@@ -64,7 +64,7 @@ private ResDto getMainMinMaxResDto(List<Weather> weatherList) {
 
 		return ResDto.builder()
 			.resultCode(200)
-			.errorMessage(ErrorMessage.SUCCESS)
+			.errorMessage(ErrorMessageUtil.SUCCESS)
 			.document(WeatherMainMinMax.builder()
 				.min(weather.getMin())
 				.max(weather.getMax())
@@ -76,7 +76,7 @@ private ResDto getMainMinMaxResDto(List<Weather> weatherList) {
 	private ResDto getCurrentResDto(WeatherMain current) {
 		return ResDto.builder()
 			.resultCode(200)
-			.errorMessage(ErrorMessage.SUCCESS)
+			.errorMessage(ErrorMessageUtil.SUCCESS)
 			.document(current)
 			.build();
 	}
@@ -101,7 +101,7 @@ public ResDto getWeekResDto(List<Weather> weatherList) {
 		}
 		return ResDto.builder()
 			.resultCode(200)
-			.errorMessage(ErrorMessage.SUCCESS)
+			.errorMessage(ErrorMessageUtil.SUCCESS)
 			.document(week)
 			.build();
 	}
@@ -118,7 +118,7 @@ public WeatherTimeResDto getTime(Double lat, Double lon) {
 			e.printStackTrace();
 			ResDto resDto = ResDto.builder()
 				.resultCode(500)
-				.errorMessage(ErrorMessage.JSON_PARSING_ERROR)
+				.errorMessage(ErrorMessageUtil.JSON_PARSING_ERROR)
 				.document(null)
 				.build();
 
@@ -128,7 +128,7 @@ public WeatherTimeResDto getTime(Double lat, Double lon) {
 			e.printStackTrace();
 			ResDto resDto = ResDto.builder()
 				.resultCode(500)
-				.errorMessage(ErrorMessage.UNKNOWN_ERROR)
+				.errorMessage(ErrorMessageUtil.UNKNOWN_ERROR)
 				.document(null)
 				.build();
 
@@ -153,7 +153,7 @@ private ResDto getTempResDto(List<WeatherTime> weatherTimeList) {
 
 		return ResDto.builder()
 			.resultCode(200)
-			.errorMessage(ErrorMessage.SUCCESS)
+			.errorMessage(ErrorMessageUtil.SUCCESS)
 			.document(weatherTempResDtoList)
 			.build();
 	}
@@ -175,7 +175,7 @@ private ResDto getRainResDto(List<WeatherTime> weatherTimeList) {
 
 		return ResDto.builder()
 			.resultCode(200)
-			.errorMessage(ErrorMessage.SUCCESS)
+			.errorMessage(ErrorMessageUtil.SUCCESS)
 			.document(weatherRainResDtoList)
 			.build();
 	}
@@ -210,7 +210,7 @@ private ResDto getOotdResDto(ResDto currentResDto, ResDto mixmaxResDto) throws I
 
 		return ResDto.builder()
 			.resultCode(200)
-			.errorMessage(ErrorMessage.SUCCESS)
+			.errorMessage(ErrorMessageUtil.SUCCESS)
 			.document(ootd)
 			.build();
 	}
diff --git a/src/main/java/com/seeme/util/ErrorMessage.java b/src/main/java/com/seeme/util/ErrorMessageUtil.java
similarity index 89%
rename from src/main/java/com/seeme/util/ErrorMessage.java
rename to src/main/java/com/seeme/util/ErrorMessageUtil.java
index 5503ac1..604dc4a 100644
--- a/src/main/java/com/seeme/util/ErrorMessage.java
+++ b/src/main/java/com/seeme/util/ErrorMessageUtil.java
@@ -1,6 +1,6 @@
 package com.seeme.util;
 
-public class ErrorMessage {
+public class ErrorMessageUtil {
 
 	public static final String API_PROVISION_ERROR = "API_PROVISION_ERROR";
 	public static final String JSON_PARSING_ERROR = "JSON_PARSING_ERROR";