diff --git a/src/main/java/club/joylink/xiannccda/alert/AlertListenerJob.java b/src/main/java/club/joylink/xiannccda/alert/AlertListenerJob.java
index c462a38..852fb76 100644
--- a/src/main/java/club/joylink/xiannccda/alert/AlertListenerJob.java
+++ b/src/main/java/club/joylink/xiannccda/alert/AlertListenerJob.java
@@ -40,9 +40,8 @@ public class AlertListenerJob implements ApplicationRunner {
       @Override
       public void accept(AlertDetail event) {
         String id = String.valueOf(idGenerator.getAndIncrement());
-        String level = "III";
         LocalDateTime alertTime = event.getAlertTime();
-        NccAlertInfo<AlertDetail> nccAlertInfo = new NccAlertInfo<>(id, level, alertTime, event);
+        NccAlertInfo<AlertDetail> nccAlertInfo = new NccAlertInfo<>(id, alertTime, event);
         alertManager.emit(nccAlertInfo);
       }
     });
diff --git a/src/main/java/club/joylink/xiannccda/alert/NccAlertInfo.java b/src/main/java/club/joylink/xiannccda/alert/NccAlertInfo.java
index 3a968f7..e224911 100644
--- a/src/main/java/club/joylink/xiannccda/alert/NccAlertInfo.java
+++ b/src/main/java/club/joylink/xiannccda/alert/NccAlertInfo.java
@@ -1,18 +1,26 @@
 package club.joylink.xiannccda.alert;
 
 import club.joylink.xiannccda.alert.core.AlertInfo;
+import club.joylink.xiannccda.exception.BusinessExceptionAssertEnum;
 import java.time.LocalDateTime;
-import lombok.AllArgsConstructor;
 import lombok.Getter;
+import lombok.NonNull;
 
-@AllArgsConstructor
 public class NccAlertInfo<D extends AlertDetail> implements AlertInfo {
+
   private String id;
   private String level;
   private LocalDateTime alertTime;
   @Getter
   private D detail;
 
+  public NccAlertInfo(@NonNull String id, @NonNull LocalDateTime alertTime, @NonNull D detail) {
+    this.id = id;
+    this.alertTime = alertTime;
+    this.detail = detail;
+    this.level = getLevelFromDetail();
+  }
+
   @Override
   public String getId() {
     return id;
@@ -32,4 +40,20 @@ public class NccAlertInfo<D extends AlertDetail> implements AlertInfo {
   public String getInfo() {
     return "";
   }
+
+  private String getLevelFromDetail() {
+    switch (detail.getAlertType()) {
+      case UNKNOWN, UNRECOGNIZED -> {
+        throw BusinessExceptionAssertEnum.SYSTEM_EXCEPTION.exception();
+      }
+      case TRAIN_DELAY_2 -> {
+        return "III";
+      }
+      case BLUE_DISPLAY, PLATFORM_DOOR_CANNOT_CLOSE, PLATFORM_DOOR_CANNOT_OPEN,
+          PLATFORM_DOOR_WITHOUT_LOCKED_SIGNAL, TRAIN_DELAY_10 -> {
+        return "I";
+      }
+      default -> throw new IllegalStateException("Unexpected value: " + detail.getAlertType());
+    }
+  }
 }