diff --git a/src/gui/ALTimerTaskWidget.py b/src/gui/ALTimerTaskWidget.py
index c656e49..d719fa6 100644
--- a/src/gui/ALTimerTaskWidget.py
+++ b/src/gui/ALTimerTaskWidget.py
@@ -154,6 +154,7 @@ class ALTimerTaskWidget(QWidget, Ui_ALTimerTaskWidget):
         self.__timer_tasks = []
         self.__check_timer = None
         self.__sort_policy = SortPolicy.BY_EXECUTE_TIME
+        self.__sort_order = Qt.SortOrder.AscendingOrder
         self.__timer_tasks_config_path = timer_tasks_config_path
 
         self.setupUi(self)
@@ -170,6 +171,7 @@ class ALTimerTaskWidget(QWidget, Ui_ALTimerTaskWidget):
         self.AddTimerTaskButton.clicked.connect(self.addTask)
         self.ClearAllTimerTasksButton.clicked.connect(self.clearAllTasks)
         self.TimerTaskSortTypeComboBox.currentIndexChanged.connect(self.onSortPolicyComboBoxChanged)
+        self.TimerTaskSortOrderToggleButton.clicked.connect(self.onSortOrderToggleButtonClicked)
         self.timerTasksChanged.connect(self.onTimerTasksChanged)
 
 
@@ -294,20 +296,24 @@ class ALTimerTaskWidget(QWidget, Ui_ALTimerTaskWidget):
 
     def sortTimerTasks(
         self,
-        policy: SortPolicy = SortPolicy.BY_EXECUTE_TIME
+        policy: SortPolicy = SortPolicy.BY_EXECUTE_TIME,
+        order: Qt.SortOrder = Qt.SortOrder.AscendingOrder
     ):
 
         if policy == SortPolicy.BY_NAME:
             self.__timer_tasks.sort(
-                key = lambda x: x["name"]
+                key = lambda x: x["name"],
+                reverse = order is Qt.SortOrder.DescendingOrder
             )
         elif policy == SortPolicy.BY_ADD_TIME:
             self.__timer_tasks.sort(
-                key = lambda x: x["add_time"]
+                key = lambda x: x["add_time"],
+                reverse = order is Qt.SortOrder.DescendingOrder
             )
         elif policy == SortPolicy.BY_EXECUTE_TIME:
             self.__timer_tasks.sort(
-                key = lambda x: x["execute_time"]
+                key = lambda x: x["execute_time"],
+                reverse = order is Qt.SortOrder.DescendingOrder
             )
 
 
@@ -343,7 +349,7 @@ class ALTimerTaskWidget(QWidget, Ui_ALTimerTaskWidget):
     ):
 
         self.TimerTasksListWidget.clear()
-        self.sortTimerTasks(self.__sort_policy)
+        self.sortTimerTasks(self.__sort_policy, self.__sort_order)
         for timer_task in self.__timer_tasks:
             item = QListWidgetItem()
             item.setData(Qt.UserRole, timer_task)
@@ -445,6 +451,18 @@ class ALTimerTaskWidget(QWidget, Ui_ALTimerTaskWidget):
         self.__sort_policy = mapping[policy]
         self.updateTimerTaskList()
 
+    @Slot()
+    def onSortOrderToggleButtonClicked(
+        self
+    ):
+
+        self.__sort_order = Qt.SortOrder.AscendingOrder\
+            if self.__sort_order is Qt.SortOrder.DescendingOrder\
+            else Qt.SortOrder.DescendingOrder
+        self.TimerTaskSortOrderToggleButton.setText(
+            "↑" if self.__sort_order is Qt.SortOrder.AscendingOrder else "↓"
+        )
+        self.updateTimerTaskList()
 
     @Slot()
     def onTimerTasksChanged(
diff --git a/src/gui/ALTimerTaskWidget.ui b/src/gui/ALTimerTaskWidget.ui
index 363ead3..5f39cdb 100644
--- a/src/gui/ALTimerTaskWidget.ui
+++ b/src/gui/ALTimerTaskWidget.ui
@@ -188,7 +188,7 @@
    <item>
     <layout class="QHBoxLayout" name="TimerTaskSortLayout">
      <property name="spacing">
-      <number>5</number>
+      <number>0</number>
      </property>
      <item>
       <widget class="QFrame" name="TimerTaskSortSpaceFrame">
@@ -259,6 +259,25 @@
        </item>
       </widget>
      </item>
+     <item>
+      <widget class="QPushButton" name="TimerTaskSortOrderToggleButton">
+       <property name="minimumSize">
+        <size>
+         <width>25</width>
+         <height>25</height>
+        </size>
+       </property>
+       <property name="maximumSize">
+        <size>
+         <width>25</width>
+         <height>25</height>
+        </size>
+       </property>
+       <property name="text">
+        <string>↑</string>
+       </property>
+      </widget>
+     </item>
     </layout>
    </item>
    <item>
diff --git a/src/gui/ALUserTreeWidget.py b/src/gui/ALUserTreeWidget.py
index b07ed64..00048a1 100644
--- a/src/gui/ALUserTreeWidget.py
+++ b/src/gui/ALUserTreeWidget.py
@@ -60,6 +60,7 @@ class ALUserTreeWidget(QTreeWidget):
         self.setDefaultDropAction(Qt.DropAction.IgnoreAction)
         self.setAlternatingRowColors(True)
         self.setSortingEnabled(True)
+        self.sortByColumn(0, Qt.SortOrder.AscendingOrder)
         self.setAnimated(True)
         self.setAllColumnsShowFocus(False)
         self.setHeaderHidden(False)