diff --git a/.idea/dataSources.xml b/.idea/dataSources.xml
new file mode 100644
index 0000000..fc01457
--- /dev/null
+++ b/.idea/dataSources.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="DataSourceManagerImpl" format="xml" multifile-model="true">
+    <data-source source="LOCAL" name="development.sqlite3" uuid="d3ab71a5-ebb0-4573-9e48-bc4bd013b015">
+      <driver-ref>sqlite.xerial</driver-ref>
+      <synchronize>true</synchronize>
+      <jdbc-driver>org.sqlite.JDBC</jdbc-driver>
+      <jdbc-url>jdbc:sqlite:$PROJECT_DIR$/storage/development.sqlite3</jdbc-url>
+      <working-dir>$ProjectFileDir$</working-dir>
+    </data-source>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/sqldialects.xml b/.idea/sqldialects.xml
new file mode 100644
index 0000000..51559ac
--- /dev/null
+++ b/.idea/sqldialects.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="SqlDialectMappings">
+    <file url="file://$PROJECT_DIR$/app/controllers/schedules_controller.rb" dialect="GenericSQL" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/app/controllers/schedules_controller.rb b/app/controllers/schedules_controller.rb
index 3a29118..4390cb1 100644
--- a/app/controllers/schedules_controller.rb
+++ b/app/controllers/schedules_controller.rb
@@ -30,6 +30,14 @@ class SchedulesController < ApplicationController
     end
   end
 
+  def reset
+    Schedule.delete_all
+    ActiveRecord::Base.connection.execute("DELETE FROM sqlite_sequence WHERE name='schedules'")
+    Rails.application.load_seed
+
+    redirect_to schedules_path, notice: "스케줄이 초기화되었습니다."
+  end
+
   def schedule_edit
     @schedule = Schedule.order(:hour, :minute)
   end
diff --git a/app/services/modbus/polling_service.rb b/app/services/modbus/polling_service.rb
index 37fce95..1b0fe2c 100644
--- a/app/services/modbus/polling_service.rb
+++ b/app/services/modbus/polling_service.rb
@@ -5,10 +5,10 @@ module Modbus
   class PollingService
     class << self
       def start
-        return if defined?(@scheduler) && @scheduler.jobs.any?
+        return if @scheduler && @scheduler.jobs.any?
 
         puts "[#{Time.current}] Modbus polling service 시작됨 (Rufus)"
-        @scheduler = Rufus::Scheduler.new
+        @scheduler ||= Rufus::Scheduler.new
 
         @scheduler.cron "0 * * * * *" do
           now = Time.now
@@ -22,6 +22,7 @@ module Modbus
       def stop
         if defined?(@scheduler)
           @scheduler.shutdown(:kill)
+          @scheduler = nil
           puts "[#{Time.current}] Modbus polling service 중지됨"
         else
           puts "[#{Time.current}] Scheduler 인스턴스 없음"
@@ -29,7 +30,7 @@ module Modbus
       end
 
       def running?
-        defined?(@scheduler) && @scheduler.jobs.any?
+        @scheduler && @scheduler.jobs.any?
       end
 
       private
diff --git a/app/views/schedules/schedule_edit.html.erb b/app/views/schedules/schedule_edit.html.erb
index 737d0ba..8aebd07 100644
--- a/app/views/schedules/schedule_edit.html.erb
+++ b/app/views/schedules/schedule_edit.html.erb
@@ -39,9 +39,15 @@
     <%= submit_tag "업데이트", class: "btn bg-primary" %>
   </div>
 <% end %>
+<div class="flex p-4">
+  <%= button_to "초기화", reset_schedules_path,
+                method: :post,
+                data: { turbo_confirm: "정말 초기화하시겠습니까? 모든 스케줄 데이터가 삭제됩니다." },
+                class: "btn bg-danger" %>
+</div>
 <div class="flex p-4">
   <%= button_to "추가하기", open_modals_path(type: "add_schedule"),
-                class: "btn btn-default",
+                class: "btn bg-default-slate",
                 data: {
                   turbo_method: :post,
                   turbo_frame: "modals"
diff --git a/config/routes.rb b/config/routes.rb
index 3d06b4e..afeff1f 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -15,6 +15,7 @@ Rails.application.routes.draw do
 
   resources :schedules do
     collection do
+      post "reset"
       get "schedule_edit"
       post "schedule_edit_update"
     end
@@ -24,8 +25,6 @@ Rails.application.routes.draw do
     collection do
       post "start"
       post "stop"
-      get "schedule_edit"
-      post "schedule_edit_update"
     end
   end