diff --git a/src/main/java/com/kamco/cd/kamcoback/inference/dto/InferenceResultDto.java b/src/main/java/com/kamco/cd/kamcoback/inference/dto/InferenceResultDto.java
index fdbb0b8d..6e36615a 100644
--- a/src/main/java/com/kamco/cd/kamcoback/inference/dto/InferenceResultDto.java
+++ b/src/main/java/com/kamco/cd/kamcoback/inference/dto/InferenceResultDto.java
@@ -200,7 +200,7 @@ public class InferenceResultDto {
       long m = (s % 3600) / 60;
       long sec = s % 60;
 
-      return String.format("%dH %dM %dS", h, m, sec);
+      return String.format("%d시간 %d분 %d초", h, m, sec);
     }
   }
 
@@ -465,6 +465,42 @@ public class InferenceResultDto {
     private String getMapSheetScope() {
       return MapSheetScope.getDescByCode(this.mapSheetScope);
     }
+
+    @Schema(description = "M1 사용시간")
+    @JsonProperty("m1ElapsedTim")
+    public String getM1ElapsedTime() {
+      return formatElapsedTime(this.m1ModelStartDttm, this.m1ModelEndDttm);
+    }
+
+    @Schema(description = "M2 사용시간")
+    @JsonProperty("m2ElapsedTim")
+    public String getM2ElapsedTime() {
+      return formatElapsedTime(this.m2ModelStartDttm, this.m2ModelEndDttm);
+    }
+
+    @Schema(description = "M3 사용시간")
+    @JsonProperty("m3ElapsedTim")
+    public String getM3ElapsedTime() {
+      return formatElapsedTime(this.m3ModelStartDttm, this.m3ModelEndDttm);
+    }
+
+    private String formatElapsedTime(ZonedDateTime start, ZonedDateTime end) {
+      if (start == null || end == null) {
+        return null;
+      }
+
+      Duration d = Duration.between(start, end);
+      if (d.isNegative()) {
+        d = d.negated();
+      }
+
+      long s = d.getSeconds();
+      long h = s / 3600;
+      long m = (s % 3600) / 60;
+      long sec = s % 60;
+
+      return String.format("%d시간 %d분 %d초", h, m, sec);
+    }
   }
 
   @Getter