diff --git a/HemuLock/AppDelegate.swift b/HemuLock/AppDelegate.swift
index 20b264f..b930866 100644
--- a/HemuLock/AppDelegate.swift
+++ b/HemuLock/AppDelegate.swift
@@ -371,6 +371,32 @@ class AppDelegate: NSObject, NSApplicationDelegate, UNUserNotificationCenterDele
         }
 
         observer = EventObserver()
+        
+        // Check for system launch event - only fire once per system boot
+        if SystemBootManager.shared.isNewSystemBoot() {
+            // Mark this boot as notified first to prevent duplicate notifications.
+            // This ensures the event fires only once per boot, even if the user
+            // enables/disables the event or relaunches the app during the same boot session.
+            SystemBootManager.shared.markBootNotified()
+            
+            // Only handle if System Launch event is enabled in config
+            if appState.appConfig.activeEvents.contains(Event.systemLaunch.tag) {
+                // Handle recording
+                if appState.appConfig.isRecordEvent {
+                    observer?.recordEvent(event: .systemLaunch)
+                }
+                
+                // Send notification
+                if appState.appConfig.notifyType != Notify.none.tag {
+                    observer?.sendNotify(event: .systemLaunch)
+                }
+                
+                // Execute script
+                if appState.appConfig.isExecScript {
+                    observer?.runScript(Event.systemLaunch.name)
+                }
+            }
+        }
     }
 
     /**
diff --git a/HemuLock/Base.lproj/Localizable.strings b/HemuLock/Base.lproj/Localizable.strings
index 3e1ac4a..ae8dfeb 100644
--- a/HemuLock/Base.lproj/Localizable.strings
+++ b/HemuLock/Base.lproj/Localizable.strings
@@ -34,6 +34,7 @@
 "SYSTEM_WAKE" = "System Wake";
 "SYSTEM_LOCK" = "System Lock";
 "SYSTEM_UNLOCK" = "System Unlock";
+"SYSTEM_LAUNCH" = "System Started";
 
 "EVENT_SCREEN_SLEEP" = "Screen Sleep";
 "EVENT_SCREEN_WAKE" = "Screen Wake";
@@ -41,6 +42,7 @@
 "EVENT_SYSTEM_WAKE" = "System Wake";
 "EVENT_SYSTEM_LOCK" = "System Lock";
 "EVENT_SYSTEM_UNLOCK" = "System Unlock";
+"EVENT_SYSTEM_LAUNCH" = "System Launch";
 
 "EMPTY_PUSHOVER" = "Pushover Configuration Parameters Error";
 "EMPTY_BARK" = "Bark Configuration Parameters Error";
diff --git a/HemuLock/Enums/Event.swift b/HemuLock/Enums/Event.swift
index af4d3d8..7d6268c 100644
--- a/HemuLock/Enums/Event.swift
+++ b/HemuLock/Enums/Event.swift
@@ -15,6 +15,7 @@ enum Event: String, CaseIterable {
     case systemWake = "SYSTEM_WAKE"
     case systemLock = "SYSTEM_LOCK"
     case systemUnLock = "SYSTEM_UNLOCK"
+    case systemLaunch = "SYSTEM_LAUNCH"
 
     var name: String {
         return rawValue
@@ -34,6 +35,8 @@ enum Event: String, CaseIterable {
             return 130
         case .systemUnLock:
             return 131
+        case .systemLaunch:
+            return 140
         }
     }
 
@@ -51,6 +54,8 @@ enum Event: String, CaseIterable {
             return NSNotification.Name(rawValue: "com.apple.screenIsLocked")
         case .systemUnLock:
             return NSNotification.Name(rawValue: "com.apple.screenIsUnlocked")
+        case .systemLaunch:
+            return NSNotification.Name(rawValue: "com.hemulock.systemLaunch")
         }
     }
 }
diff --git a/HemuLock/Managers/SystemBootManager.swift b/HemuLock/Managers/SystemBootManager.swift
new file mode 100644
index 0000000..7e4269f
--- /dev/null
+++ b/HemuLock/Managers/SystemBootManager.swift
@@ -0,0 +1,81 @@
+//
+//  SystemBootManager.swift
+//  HemuLock
+//
+//  Created by HemuLock on 2024/02/09.
+//
+
+import Foundation
+
+/**
+ SystemBootManager handles detection of system boot events.
+ 
+ This manager tracks system boot time and determines if a notification
+ for the current boot has already been sent. It uses sysctl to get the
+ system boot time and UserDefaults to persist the last notified boot time.
+ */
+class SystemBootManager {
+    static let shared = SystemBootManager()
+    
+    private let lastBootTimeKey = "last_notified_boot_time"
+    
+    // Tolerance in seconds for comparing boot times.
+    // System boot times may have minor differences due to precision,
+    // so we use a 1-second tolerance to avoid false positives.
+    private let bootTimeToleranceSeconds: TimeInterval = 1.0
+    
+    private init() {}
+    
+    /**
+     Get the current system boot time using sysctl.
+     
+     - Returns: The date when the system was last booted, or nil if unable to determine
+     */
+    func getSystemBootTime() -> Date? {
+        var mib = [CTL_KERN, KERN_BOOTTIME]
+        var bootTime = timeval()
+        var size = MemoryLayout<timeval>.stride
+        
+        if sysctl(&mib, UInt32(mib.count), &bootTime, &size, nil, 0) != -1 {
+            return Date(timeIntervalSince1970: TimeInterval(bootTime.tv_sec))
+        }
+        return nil
+    }
+    
+    /**
+     Check if this is a new system boot (not just app relaunch).
+     
+     Compares the current system boot time with the last boot time that was notified.
+     
+     - Returns: true if this is a new boot that hasn't been notified yet, false otherwise
+     */
+    func isNewSystemBoot() -> Bool {
+        guard let currentBootTime = getSystemBootTime() else {
+            // If we can't determine boot time, don't trigger the event
+            return false
+        }
+        
+        // Get the last notified boot time from UserDefaults
+        if let lastBootTime = UserDefaults.standard.object(forKey: lastBootTimeKey) as? Date {
+            // If the boot times are different, it's a new boot
+            // Allow a small tolerance for timing differences
+            return abs(currentBootTime.timeIntervalSince(lastBootTime)) > bootTimeToleranceSeconds
+        }
+        
+        // If no previous boot time is stored, consider it a new boot
+        return true
+    }
+    
+    /**
+     Mark the current boot as notified.
+     
+     Stores the current system boot time in UserDefaults to prevent
+     duplicate notifications for the same boot.
+     */
+    func markBootNotified() {
+        guard let currentBootTime = getSystemBootTime() else {
+            return
+        }
+        UserDefaults.standard.set(currentBootTime, forKey: lastBootTimeKey)
+    }
+}
diff --git a/HemuLock/en.lproj/Localizable.strings b/HemuLock/en.lproj/Localizable.strings
index ceb9931..ed07b6f 100644
--- a/HemuLock/en.lproj/Localizable.strings
+++ b/HemuLock/en.lproj/Localizable.strings
@@ -34,6 +34,7 @@
 "SYSTEM_WAKE" = "System Wake";
 "SYSTEM_LOCK" = "System Lock";
 "SYSTEM_UNLOCK" = "System Unlock";
+"SYSTEM_LAUNCH" = "System Started";
 
 "EVENT_SCREEN_SLEEP" = "Screen Sleep";
 "EVENT_SCREEN_WAKE" = "Screen Wake";
@@ -41,6 +42,7 @@
 "EVENT_SYSTEM_WAKE" = "System Wake";
 "EVENT_SYSTEM_LOCK" = "System Lock";
 "EVENT_SYSTEM_UNLOCK" = "System Unlock";
+"EVENT_SYSTEM_LAUNCH" = "System Launch";
 
 "EMPTY_PUSHOVER" = "Pushover Configuration Parameters Error";
 "EMPTY_BARK" = "Bark Configuration Parameters Error";
diff --git a/HemuLock/zh-Hans.lproj/Localizable.strings b/HemuLock/zh-Hans.lproj/Localizable.strings
index 8be8c16..98e6742 100644
--- a/HemuLock/zh-Hans.lproj/Localizable.strings
+++ b/HemuLock/zh-Hans.lproj/Localizable.strings
@@ -37,6 +37,7 @@
 "SYSTEM_WAKE" = "系统被唤醒";
 "SYSTEM_LOCK" = "系统已被锁定";
 "SYSTEM_UNLOCK" = "系统已解锁";
+"SYSTEM_LAUNCH" = "系统已启动";
 
 "EVENT_SCREEN_SLEEP" = "屏幕睡眠";
 "EVENT_SCREEN_WAKE" = "屏幕唤醒";
@@ -44,6 +45,7 @@
 "EVENT_SYSTEM_WAKE" = "系统唤醒";
 "EVENT_SYSTEM_LOCK" = "锁定";
 "EVENT_SYSTEM_UNLOCK" = "解锁";
+"EVENT_SYSTEM_LAUNCH" = "系统启动";
 
 "EMPTY_PUSHOVER" = "Pushover配置参数错误";
 "EMPTY_BARK" = "Bark配置参数错误";