diff --git a/assets/scheduler.yaml b/assets/scheduler.yaml
index 2707bf0..17874ef 100644
--- a/assets/scheduler.yaml
+++ b/assets/scheduler.yaml
@@ -1,7 +1,8 @@
 ---
 scheduler:
   alias: test
-  cron: '* * * * *'
+  # cron: '* * * * *'
+  interval: 3000 # ms
   enableLog: true # (Optional) default: false
 
 property:
diff --git a/lib/cli/commands/scheduler/scheduler_interval.dart b/lib/cli/commands/scheduler/scheduler_interval.dart
new file mode 100644
index 0000000..bf0a99e
--- /dev/null
+++ b/lib/cli/commands/scheduler/scheduler_interval.dart
@@ -0,0 +1,32 @@
+import 'package:oto_cli/oto/data/command_data.dart';
+
+class SchedulerInterval {
+
+  int interval;
+  bool activate = true;
+  bool progress = false;
+  DataBuild build;
+
+  Future Function(DataBuild build) executeFunc;
+
+  SchedulerInterval(this.interval, this.build, this.executeFunc) {
+    startInterval();
+  }
+
+  void startInterval() async {
+    while(activate) {
+      await Future.delayed(Duration(milliseconds: interval));
+      if(!progress) {
+        execute();
+      }
+    }
+  }
+
+  void execute() async {
+    if(activate) {
+      progress = true;
+      await executeFunc(build);
+      progress = false;
+    }
+  }
+}
\ No newline at end of file
diff --git a/lib/cli/commands/scheduler/scheduler_isolate.dart b/lib/cli/commands/scheduler/scheduler_isolate.dart
index f0d5ced..baf8b06 100644
--- a/lib/cli/commands/scheduler/scheduler_isolate.dart
+++ b/lib/cli/commands/scheduler/scheduler_isolate.dart
@@ -7,6 +7,7 @@ import 'package:dart_framework/platform/isolate_manager.dart';
 import 'package:dart_framework/utils/string_util.dart';
 import 'package:dart_framework/utils/system_util.dart';
 import 'package:file_hasher/file_hasher.dart';
+import 'package:oto_cli/cli/commands/scheduler/scheduler_interval.dart';
 import 'package:oto_cli/oto/application.dart';
 import 'package:oto_cli/oto/data/command_data.dart';
 
@@ -21,8 +22,10 @@ class IsolateScheduler extends IsolateBase {
   bool logEnable = false;
   bool notProgress = true;
   bool cronClosed = true;
+  int? interval;
+  String? cronExpress;
   late DataBuild build;
-  late String cronExpress;
+  SchedulerInterval? schedulerInterval;
   
   Cron? cron;
   int nextStartTime = 0;
@@ -40,13 +43,15 @@ class IsolateScheduler extends IsolateBase {
       await Future.delayed(Duration(seconds: 1));
 
       if(file.existsSync()) {
+        var updated = false;
         var hash = await FileHasher.hash(file);
         if(hash != fileHash) {
+          updated = true;
           fileHash = hash;
           //파일 내용이 바뀔때 마다 새로 읽어 들임
           var map = Application.getMapFromYamlA(await file.readAsString());
           
-          //Validate yaml format
+          //============ Validate yaml format ============//
           try {
             build = DataBuild.fromJson(map!);
           } on Exception catch(e, stacktace) {
@@ -58,25 +63,49 @@ class IsolateScheduler extends IsolateBase {
             return;
           }
 
-          try {
-            Schedule.parse(build.scheduler!.cron);
-            cronExpress = build.scheduler!.cron;
-          } on Error catch(e, stacktace) {
-            onError("Cron express '${build.scheduler!.cron}' is not a suitable format.");
+          var scheduler = build.scheduler!;
+          if(scheduler.cron == null && scheduler.interval == null) {
+            onError('A scheduler script must have either a cron entry or an interval entry.');
             return;
           }
+
+          if(scheduler.cron != null) {
+            try {
+              Schedule.parse(scheduler.cron!);
+              cronExpress = scheduler.cron!;
+            } on Error catch(e, stacktace) {
+              onError("Cron express '${build.scheduler!.cron}' is not a suitable format.");
+              return;
+            }
+          }
+
+          if(scheduler.interval != null) {
+            interval = scheduler.interval!;
+          }
         }
 
-        if(cronClosed) {
-          cronClosed = false;
-          cron = Cron();
-          cron!.schedule(Schedule.parse(cronExpress), () async {
-            if(notProgress) {
-              await execute(build);
-              cronClosed = true;
-              await cron!.close();
+        //============ execute cron/interval ============//
+        if(cronExpress != null) {
+          //Use cron
+          if(cronClosed) {
+            cronClosed = false;
+            cron = Cron();
+            cron!.schedule(Schedule.parse(cronExpress!), () async {
+              if(notProgress) {
+                await execute(build);
+                cronClosed = true;
+                await cron!.close();
+              }
+            });
+          }
+        } else {
+          //Use interval
+          if(updated) {
+            if(schedulerInterval != null) {
+              schedulerInterval!.activate = false;
             }
-          });
+            schedulerInterval = SchedulerInterval(interval!, build, execute);
+          }
         }
       } else {
         //file이 없을시 종료
@@ -93,7 +122,7 @@ class IsolateScheduler extends IsolateBase {
       logFile = File('$logsPath/${alias}_${getDate()}_${getTime().replaceAll(':', '')}_[$pid].txt');
       log('Start process on pid [$pid]');
     }
-    await Future.delayed(Duration(seconds: 30)); //To-do: delete test, exe task
+    await Future.delayed(Duration(seconds: 1)); //To-do: delete test, exe task
     notProgress = true;
     return simpleFuture;
   }
@@ -117,4 +146,4 @@ class IsolateScheduler extends IsolateBase {
   void sendTerminated(String type, String message) {
     send(IsoMessege('terminated', data: {'type': type, 'message': message, 'alias': alias}));
   }
-}
+}
\ No newline at end of file
diff --git a/lib/cli/commands/scheduler/scheduler_manager.dart b/lib/cli/commands/scheduler/scheduler_manager.dart
index ece97bb..b3c5908 100644
--- a/lib/cli/commands/scheduler/scheduler_manager.dart
+++ b/lib/cli/commands/scheduler/scheduler_manager.dart
@@ -123,6 +123,7 @@ class SchedulerManager {
     print('');
     print('[alias]'.padRight(8) + alias);
     print('[path]'.padRight(8) + newPath);
+    print('');
 
     //update settings
     var local = _localData;
@@ -172,7 +173,7 @@ class SchedulerManager {
       }
       print('');
     }
-    _checkProcess();
+    await _checkProcess();
     return simpleFuture;
   }
 
diff --git a/lib/oto/data/command_data.dart b/lib/oto/data/command_data.dart
index dc57c20..58de5e0 100644
--- a/lib/oto/data/command_data.dart
+++ b/lib/oto/data/command_data.dart
@@ -27,7 +27,8 @@ class DataBuild {
 @JsonSerializable()
 class DataScheduler {
   late String alias;
-  late String cron;
+  late String? cron;
+  late int? interval;
   late bool? enableLog;
 
   DataScheduler();
diff --git a/lib/oto/data/command_data.g.dart b/lib/oto/data/command_data.g.dart
index c26e1f2..6b1e2a1 100644
--- a/lib/oto/data/command_data.g.dart
+++ b/lib/oto/data/command_data.g.dart
@@ -28,13 +28,15 @@ Map<String, dynamic> _$DataBuildToJson(DataBuild instance) => <String, dynamic>{
 DataScheduler _$DataSchedulerFromJson(Map<String, dynamic> json) =>
     DataScheduler()
       ..alias = json['alias'] as String
-      ..cron = json['cron'] as String
+      ..cron = json['cron'] as String?
+      ..interval = (json['interval'] as num?)?.toInt()
       ..enableLog = json['enableLog'] as bool?;
 
 Map<String, dynamic> _$DataSchedulerToJson(DataScheduler instance) =>
     <String, dynamic>{
       'alias': instance.alias,
       'cron': instance.cron,
+      'interval': instance.interval,
       'enableLog': instance.enableLog,
     };