diff --git a/app/src/main/java/com/example/shiftalarm/FragmentSettingsLab.kt b/app/src/main/java/com/example/shiftalarm/FragmentSettingsLab.kt
index 9603850..d427e35 100644
--- a/app/src/main/java/com/example/shiftalarm/FragmentSettingsLab.kt
+++ b/app/src/main/java/com/example/shiftalarm/FragmentSettingsLab.kt
@@ -4,8 +4,11 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.widget.Toast
 import androidx.fragment.app.Fragment
+import androidx.lifecycle.lifecycleScope
 import com.example.shiftalarm.databinding.FragmentSettingsLabBinding
+import kotlinx.coroutines.launch
 
 class FragmentSettingsLab : Fragment() {
 
@@ -20,6 +23,56 @@ class FragmentSettingsLab : Fragment() {
         return binding.root
     }
 
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        
+        setupNumberPicker()
+        loadAnnualLeave()
+        setupSaveButton()
+    }
+
+    private fun setupNumberPicker() {
+        binding.npTotalDays.apply {
+            minValue = 1
+            maxValue = 25
+            wrapSelectorWheel = false
+        }
+    }
+
+    private fun loadAnnualLeave() {
+        lifecycleScope.launch {
+            val repo = ShiftRepository(requireContext())
+            
+            val annualLeave = repo.getAnnualLeave()
+            annualLeave?.let {
+                binding.npTotalDays.value = it.totalDays.toInt()
+                binding.tvRemainingDays.text = String.format("%.1f", it.remainingDays)
+            } ?: run {
+                // Default: 15 days
+                binding.npTotalDays.value = 15
+                binding.tvRemainingDays.text = "15.0"
+            }
+        }
+    }
+
+    private fun setupSaveButton() {
+        binding.btnSaveAnnualLeave.setOnClickListener {
+            val totalDays = binding.npTotalDays.value.toFloat()
+            
+            lifecycleScope.launch {
+                val repo = ShiftRepository(requireContext())
+                
+                repo.recalculateAndSaveAnnualLeave(totalDays)
+                
+                val updated = repo.getAnnualLeave()
+                updated?.let {
+                    binding.tvRemainingDays.text = String.format("%.1f", it.remainingDays)
+                    Toast.makeText(requireContext(), "연차가 저장되었습니다. (남은 연차: ${String.format("%.1f", it.remainingDays)}일)", Toast.LENGTH_SHORT).show()
+                }
+            }
+        }
+    }
+
     override fun onDestroyView() {
         super.onDestroyView()
         _binding = null
diff --git a/app/src/main/res/layout/fragment_settings_lab.xml b/app/src/main/res/layout/fragment_settings_lab.xml
index 92ad376..2b53942 100644
--- a/app/src/main/res/layout/fragment_settings_lab.xml
+++ b/app/src/main/res/layout/fragment_settings_lab.xml
@@ -5,32 +5,124 @@
     android:layout_height="match_parent"
     android:orientation="vertical"
     android:padding="24dp"
-    android:gravity="center">
-
-    <ImageView
-        android:layout_width="80dp"
-        android:layout_height="80dp"
-        android:src="@drawable/ic_settings"
-        app:tint="@color/text_tertiary"
-        android:layout_marginBottom="16dp"
-        android:alpha="0.5"/>
+    android:gravity="center_horizontal">
 
+    <!-- Header Title -->
     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="실험실 기능 준비 중"
-        android:textSize="18sp"
+        android:text="나의 연차 설정"
+        android:textSize="20sp"
         android:textStyle="bold"
-        android:textColor="@color/text_secondary"
-        android:layout_marginBottom="8dp"/>
+        android:textColor="@color/text_primary"
+        android:layout_marginBottom="32dp"/>
 
+    <!-- Total Annual Leave Setting -->
+    <androidx.cardview.widget.CardView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="24dp"
+        app:cardCornerRadius="16dp"
+        app:cardElevation="4dp"
+        app:cardBackgroundColor="@color/surface">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"
+            android:padding="24dp"
+            android:gravity="center">
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="총 연차"
+                android:textSize="16sp"
+                android:textColor="@color/text_secondary"
+                android:layout_marginBottom="16dp"/>
+
+            <!-- NumberPicker for Total Days -->
+            <NumberPicker
+                android:id="@+id/npTotalDays"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginBottom="8dp"/>
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="일"
+                android:textSize="14sp"
+                android:textColor="@color/text_tertiary"/>
+
+        </LinearLayout>
+
+    </androidx.cardview.widget.CardView>
+
+    <!-- Remaining Annual Leave Display -->
+    <androidx.cardview.widget.CardView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="32dp"
+        app:cardCornerRadius="16dp"
+        app:cardElevation="4dp"
+        app:cardBackgroundColor="@color/surface">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"
+            android:padding="24dp"
+            android:gravity="center">
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="남은 연차"
+                android:textSize="16sp"
+                android:textColor="@color/text_secondary"
+                android:layout_marginBottom="8dp"/>
+
+            <TextView
+                android:id="@+id/tvRemainingDays"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="0.0"
+                android:textSize="36sp"
+                android:textStyle="bold"
+                android:textColor="@color/primary"
+                android:layout_marginBottom="4dp"/>
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="일"
+                android:textSize="14sp"
+                android:textColor="@color/text_tertiary"/>
+
+        </LinearLayout>
+
+    </androidx.cardview.widget.CardView>
+
+    <!-- Calculation Info -->
     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="더욱 편리한 기능을 개발하고 있습니다.\n다음 업데이트를 기대해 주세요!"
-        android:textSize="14sp"
+        android:text="※ 연차: -1일 차감  /  반년: -0.5일 차감"
+        android:textSize="13sp"
         android:textColor="@color/text_tertiary"
-        android:gravity="center"
-        android:lineSpacingExtra="4dp"/>
+        android:layout_marginBottom="24dp"
+        android:gravity="center"/>
+
+    <!-- Save Button -->
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/btnSaveAnnualLeave"
+        android:layout_width="match_parent"
+        android:layout_height="56dp"
+        android:text="저장"
+        android:textSize="16sp"
+        android:textStyle="bold"
+        app:cornerRadius="12dp"
+        android:backgroundTint="@color/primary"/>
 
 </LinearLayout>
diff --git a/app/src/main/res/values-en/strings.xml b/app/src/main/res/values-en/strings.xml
index 9561a1d..15b9dc0 100644
--- a/app/src/main/res/values-en/strings.xml
+++ b/app/src/main/res/values-en/strings.xml
@@ -1,3 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="app_name">shiftring</string>
+    <string name="app_name">Shift Alarm</string>
+    <string name="team_selection">Team selection</string>
+    <string name="current_shift">Current shift: %1$s</string>
+    <string name="next_shift">Next shift: %1$s</string>
+    <string name="alarm_status">Alarm Status</string>
+    <string name="company_selection">Company selection</string>
+    <string name="tab_basic">Basic Settings</string>
+    <string name="tab_alarm">Alarm Settings</string>
+    <string name="tab_additional">Extras</string>
+    <string name="tab_lab">Leave Management</string>
+    <string-array name="factory_array">
+        <item>Jeonju</item>
+        <item>Nonsan</item>
+    </string-array>
+    <string-array name="team_array">
+        <item>A Team</item>
+        <item>B Team</item>
+        <item>C Team</item>
+        <item>D Team</item>
+    </string-array>
+    <string-array name="theme_array">
+        <item>System Settings</item>
+        <item>Light</item>
+        <item>Dark</item>
+    </string-array>
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 36cf5df..ea52b0b 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -9,7 +9,7 @@
     <string name="tab_basic">기본 설정</string>
     <string name="tab_alarm">알람 설정</string>
     <string name="tab_additional">부가기능</string>
-    <string name="tab_lab">실험실</string>
+    <string name="tab_lab">휴가 관리</string>
 
     <string-array name="factory_array">
         <item>전주</item>