diff --git a/Assets/Scripts/BeiBao/Inventory.cs b/Assets/Scripts/BeiBao/Inventory.cs
index 03c278c..361f5b0 100644
--- a/Assets/Scripts/BeiBao/Inventory.cs
+++ b/Assets/Scripts/BeiBao/Inventory.cs
@@ -1,24 +1,27 @@
-    using System;
-    using System.Collections.Generic;
-    using System.Text;
-    using UnityEngine;
+using System;
+using System.Collections.Generic;
+using System.Text;
+using UnityEngine;
 
-    namespace BeiBao
+namespace BeiBao
 {
-/// <summary>
-/// 背包类
-/// 背包是由多个格子组成的，每个格子都可以存放不同的物品。
-/// </summary>
+    /// <summary>
+    /// 背包类
+    /// 背包是由多个格子组成的，每个格子都可以存放不同的物品。
+    /// </summary>
     public class Inventory
     {
-        public int SlotCount { get; set; } // 背包格子的数量
+        private int _slotCount;
+
+        public int SlotCount => _slotCount; // 背包格子的数量
+
         private List<InventorySlot> slots;
 
         public Inventory(int slotCount)
         {
-            SlotCount = slotCount;
+            _slotCount = slotCount;
             slots = new List<InventorySlot>();
-            for (int i = 0; i < SlotCount; i++)
+            for (int i = 0; i < _slotCount; i++)
             {
                 slots.Add(new InventorySlot());
             }
@@ -28,24 +31,30 @@
         public bool AddItem(Item item, int quantity)
         {
             int remainingQuantity = quantity;
-        
+            int tmpQuantity = quantity;
+
             foreach (var slot in slots)
             {
                 if (remainingQuantity == 0) break;
 
+                var tmpItem = new Item(item.ItemName, item.ItemID, item.MaxStack);
+
                 if (slot.IsEmpty)
                 {
                     // 如果格子为空，直接放入物品
-                    remainingQuantity = item.AddQuantity(remainingQuantity);
-                    slot.AddItem(item, quantity - remainingQuantity);
+                    remainingQuantity = tmpItem.CheckAddQuantity(remainingQuantity);
+                    slot.AddItem(tmpItem, tmpQuantity - remainingQuantity);
                 }
-                else if (slot.Item.ItemID == item.ItemID && slot.Item.Quantity < slot.Item.MaxStack)
+                else if (slot.Item.ItemID == tmpItem.ItemID && slot.Item.Quantity < slot.Item.MaxStack)
                 {
                     // 如果格子内物品与新物品相同，并且未满堆叠，堆叠物品
-                    remainingQuantity = slot.Item.AddQuantity(remainingQuantity);
+                    remainingQuantity = slot.Item.CheckAddQuantity(remainingQuantity);
                 }
+
+                tmpQuantity = remainingQuantity;
             }
 
+            Debug.Log($"向背包中添加{item.ItemName} 数量为：{quantity}");
             return remainingQuantity == 0;
         }
 
@@ -53,17 +62,22 @@
         public bool RemoveItem(int itemID, int quantity)
         {
             int remainingQuantity = quantity;
+            int tmpQuantity = quantity;
 
-            foreach (var slot in slots)
+            for (var i = slots.Count - 1; i >= 0; i--)
             {
                 if (remainingQuantity == 0) break;
 
+                var slot = slots[i];
                 if (!slot.IsEmpty && slot.Item.ItemID == itemID)
                 {
-                    remainingQuantity -= slot.Item.RemoveQuantity(remainingQuantity) ? remainingQuantity : 0;
+                    remainingQuantity = slot.Item.CheckRemoveQuantity(remainingQuantity);
+                    slot.RemoveItem(tmpQuantity - remainingQuantity);
+                    tmpQuantity = remainingQuantity;
                 }
             }
 
+            Debug.Log($"向背包中取出物品id{itemID} 数量为：{quantity}");
             return remainingQuantity == 0;
         }
 
@@ -78,8 +92,8 @@
                     sb.AppendLine($"{slot.Item.ItemName} - {slot.Item.Quantity}/{slot.Item.MaxStack}");
                 }
             }
+
             Debug.Log(sb.ToString());
         }
     }
-
 }
\ No newline at end of file
diff --git a/Assets/Scripts/BeiBao/InventorySlot.cs b/Assets/Scripts/BeiBao/InventorySlot.cs
index f482187..4f236d6 100644
--- a/Assets/Scripts/BeiBao/InventorySlot.cs
+++ b/Assets/Scripts/BeiBao/InventorySlot.cs
@@ -6,7 +6,13 @@
     /// </summary>
     public class InventorySlot
     {
-        public Item Item { get; set; }
+        private Item _item;
+
+        /// <summary>
+        /// 物品
+        /// </summary>
+        public Item Item => _item;
+
         public bool IsEmpty => Item == null;
 
         // 将物品添加到格子中
@@ -14,7 +20,7 @@
         {
             if (IsEmpty)
             {
-                Item = item;
+                _item = item;
                 return Item.AddQuantity(quantity) == 0;
             }
 
@@ -33,7 +39,7 @@
             {
                 if (Item.Quantity == 0)
                 {
-                    Item = null; // 如果物品数量为零，则清空格子
+                    _item = null; // 如果物品数量为零，则清空格子
                 }
                 return true;
             }
diff --git a/Assets/Scripts/BeiBao/Item.cs b/Assets/Scripts/BeiBao/Item.cs
index 59c80a3..329f9f2 100644
--- a/Assets/Scripts/BeiBao/Item.cs
+++ b/Assets/Scripts/BeiBao/Item.cs
@@ -11,12 +11,24 @@
         private int _maxStack;
         private int _quantity;
 
+        /// <summary>
+        /// 名字
+        /// </summary>
         public string ItemName => _itemName;
 
+        /// <summary>
+        /// ID
+        /// </summary>
         public int ItemID => _itemID;
 
+        /// <summary>
+        /// 最大堆叠数量
+        /// </summary>
         public int MaxStack => _maxStack;
 
+        /// <summary>
+        /// 当前数量
+        /// </summary>
         public int Quantity => _quantity;
 
         public Item(string itemName, int itemID, int maxStack)
@@ -45,6 +57,17 @@
             return remaining;
         }
 
+        /// <summary>
+        /// 仅作为检查，并不发生实际的数据改变
+        /// </summary>
+        /// <param name="quantity"></param>
+        /// <returns></returns>
+        public int CheckAddQuantity(int quantity)
+        {
+            int remaining = quantity;
+            return Quantity + remaining > MaxStack ? remaining = (Quantity + quantity) - MaxStack : 0;
+        }
+
         // 尝试移除数量，返回是否成功
         public bool RemoveQuantity(int quantity)
         {
@@ -56,5 +79,16 @@
 
             return false;
         }
+
+        /// <summary>
+        /// 仅作为检查，并不发生实际的数据改变
+        /// </summary>
+        /// <param name="quantity"></param>
+        /// <returns></returns>
+        public int CheckRemoveQuantity(int quantity)
+        {
+            int tmp = quantity - _quantity;
+            return tmp <= 0 ? 0 : tmp;
+        }
     }
 }
\ No newline at end of file