diff --git a/Assets/Scripts/BuildingPlacement.cs b/Assets/Scripts/BuildingPlacement.cs
index 52014da..ba0ad4c 100644
--- a/Assets/Scripts/BuildingPlacement.cs
+++ b/Assets/Scripts/BuildingPlacement.cs
@@ -148,12 +148,24 @@ namespace Northbound
 
         private void OnCancel(InputAction.CallbackContext context)
         {
-            // 드래그 중일 때만 취소
+            // 드래그 중일 때 드래그 취소
             if (isDragging && isBuildModeActive)
             {
                 CancelDrag();
                 Debug.Log("<color=yellow>[BuildingPlacement] 드래그 건설 취소됨</color>");
             }
+            // 건설 모드 활성화 상태면 건설 모드 종료
+            else if (isBuildModeActive)
+            {
+                isBuildModeActive = false;
+                if (BuildingQuickslotUI.Instance != null)
+                {
+                    BuildingQuickslotUI.Instance.HideQuickslot();
+                }
+                DestroyPreview();
+                ClearDragPreviews();
+                Debug.Log("<color=yellow>[BuildingPlacement] 건설 모드 취소됨</color>");
+            }
         }
 
         private void OnToggleBuildMode(InputAction.CallbackContext context)
diff --git a/Assets/Scripts/BuildingQuickslotUI.cs b/Assets/Scripts/BuildingQuickslotUI.cs
index f4dc709..db43264 100644
--- a/Assets/Scripts/BuildingQuickslotUI.cs
+++ b/Assets/Scripts/BuildingQuickslotUI.cs
@@ -29,6 +29,7 @@ namespace Northbound
         private List<BuildingSlotButton> slotButtons = new List<BuildingSlotButton>();
         private BuildingPlacement buildingPlacement;
         private int currentSelectedIndex = -1;
+        private int lastSelectedIndex = 0;
         private PlayerInputActions _inputActions;
         private InputAction[] _quickslotActions;
 
@@ -234,8 +235,12 @@ namespace Northbound
             // 퀵슬롯 입력 활성화
             EnableQuickslotActions(true);
 
-            // 기본 선택 (첫 번째 건물)
-            if (slotButtons.Count > 0)
+            // 마지막으로 선택된 건물 선택
+            if (slotButtons.Count > 0 && lastSelectedIndex >= 0 && lastSelectedIndex < slotButtons.Count)
+            {
+                SelectBuilding(lastSelectedIndex);
+            }
+            else if (slotButtons.Count > 0)
             {
                 SelectBuilding(0);
             }
@@ -286,6 +291,7 @@ namespace Northbound
 
             // 새로운 선택
             currentSelectedIndex = index;
+            lastSelectedIndex = index;
             slotButtons[index].SetSelected(true);
 
             // BuildingPlacement에 알림