diff --git a/HDFwear/Setting/OtherSettingVC.swift b/HDFwear/Setting/OtherSettingVC.swift
index c21060d..6b87d12 100644
--- a/HDFwear/Setting/OtherSettingVC.swift
+++ b/HDFwear/Setting/OtherSettingVC.swift
@@ -191,7 +191,7 @@ extension OtherSettingVC: UITableViewDelegate, UITableViewDataSource {
                 }
             }
         case "12小时":
-            BluetoothManager.shared.newSetTimeFormat(format: .hour_24) {[weak self] error in
+            BluetoothManager.shared.newSetTimeFormat(format: .hour_12) {[weak self] error in
                 if error == nil {
                     user.timeFormat = 1
                     self?.updateUI(indexPath, user: user)
diff --git a/HDFwear/Tools/Bluetooth+Types.swift b/HDFwear/Tools/Bluetooth+Types.swift
index fa00ea4..b0fd066 100644
--- a/HDFwear/Tools/Bluetooth+Types.swift
+++ b/HDFwear/Tools/Bluetooth+Types.swift
@@ -63,8 +63,8 @@ enum TemperatureUnit: UInt8 {
     case fahrenheit = 1
 }
 enum TimeFormat: UInt8 {
-    case hour_24 = 1
-    case hour_12 = 0
+    case hour_24 = 0
+    case hour_12 = 1
 }
 
 enum BleCmd: UInt8 {