diff --git a/src/main/java/com/hyundai/softeer/backend/domain/lottery/drawing/service/PreviewService.java b/src/main/java/com/hyundai/softeer/backend/domain/lottery/drawing/service/PreviewService.java
index b00a4af2..ca543e7f 100644
--- a/src/main/java/com/hyundai/softeer/backend/domain/lottery/drawing/service/PreviewService.java
+++ b/src/main/java/com/hyundai/softeer/backend/domain/lottery/drawing/service/PreviewService.java
@@ -25,9 +25,30 @@ public EventUser preview(PreviewRequest previewRequest, Model model) {
             throw new DrawingEventNotParticipantException();
         }
 
-        double scoreGame1 = Double.parseDouble((String) eventUser.getScores().get("1_game_score"));
+        double scoreGame1 = getGameScore(eventUser.getScores().get("1_game_score"));
         model.addAttribute("score", String.format("%.1f", scoreGame1));
 
         return eventUser;
     }
+
+    private double getGameScore(Object rawGameScore) {
+        double scoreGame1;
+        if (rawGameScore != null) {
+            if (rawGameScore instanceof String) {
+                try {
+                    scoreGame1 = Double.parseDouble((String) rawGameScore);
+                } catch (NumberFormatException e) {
+                    scoreGame1 = 0.0;
+                }
+            } else if (rawGameScore instanceof Number) {
+                scoreGame1 = ((Number) rawGameScore).doubleValue();
+            } else {
+                scoreGame1 = 0.0;
+            }
+        } else {
+            scoreGame1 = 0.0;
+        }
+
+        return scoreGame1;
+    }
 }