diff --git a/src/main/java/com/io/yutian/aulib/util/InventoryUtil.java b/src/main/java/com/io/yutian/aulib/util/InventoryUtil.java
new file mode 100644
index 0000000..028be51
--- /dev/null
+++ b/src/main/java/com/io/yutian/aulib/util/InventoryUtil.java
@@ -0,0 +1,28 @@
+package com.io.yutian.aulib.util;
+
+import org.bukkit.Material;
+import org.bukkit.inventory.Inventory;
+import org.bukkit.inventory.ItemStack;
+
+public class InventoryUtil {
+
+    public static void takeItemStack(Inventory inventory, ItemStack itemStack, int amount) {
+        int index = -1;
+        int nowAmount = amount;
+        while (index < inventory.getSize() && nowAmount > 0) {
+            ++index;
+            ItemStack i = inventory.getItem(index);
+            if (i != null && ItemStackUtil.matches(itemStack, i)) {
+                int k = i.getAmount();
+                if (k < nowAmount) {
+                    i.setType(Material.AIR);
+                } else {
+                    int l = k - nowAmount;
+                    i.setAmount(l);
+                }
+                nowAmount -= k;
+            }
+        }
+    }
+
+}
diff --git a/src/main/java/com/io/yutian/aulib/util/ItemStackUtil.java b/src/main/java/com/io/yutian/aulib/util/ItemStackUtil.java
new file mode 100644
index 0000000..63b4d82
--- /dev/null
+++ b/src/main/java/com/io/yutian/aulib/util/ItemStackUtil.java
@@ -0,0 +1,99 @@
+package com.io.yutian.aulib.util;
+
+import com.io.yutian.aulib.nbt.NBTCompound;
+import com.io.yutian.aulib.nbt.NBTItem;
+import org.bukkit.Bukkit;
+import org.bukkit.Material;
+import org.bukkit.inventory.Inventory;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.ItemMeta;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ItemStackUtil {
+
+    public static List<ItemStack> mergeItems(ItemStack item, int amount) {
+        int maxStackSize = item.getMaxStackSize();
+        int totalAmount = amount;
+        int remainder = totalAmount % maxStackSize;
+        int quotient = totalAmount / maxStackSize;
+        List<ItemStack> items = new ArrayList<>();
+        for (int i = 0; i < quotient; i++) {
+            ItemStack itemStack = item.clone();
+            itemStack.setAmount(maxStackSize);
+            items.add(itemStack);
+        }
+        ItemStack itemStack = item.clone();
+        itemStack.setAmount(remainder);
+        items.add(itemStack);
+        return items;
+    }
+
+    public static boolean matches(@Nullable ItemStack original, @Nullable ItemStack tester) {
+        if (original == null || tester == null) {
+            return false;
+        }
+        original = original.clone();
+        original.setAmount(1);
+        tester = tester.clone();
+        tester.setAmount(1);
+        Material comparisonType = original.getType().isLegacy() ? Bukkit.getUnsafe().fromLegacy(original.getData(), true) : original.getType();
+        boolean flag = comparisonType == tester.getType() && original.getDurability() == tester.getDurability() && original.hasItemMeta() == tester.hasItemMeta() && (!original.hasItemMeta() || Bukkit.getItemFactory().equals(original.getItemMeta(), tester.getItemMeta()));
+        if (!flag) {
+            return false;
+        }
+        NBTItem nbtOriginal = new NBTItem(original);
+        NBTItem nbtTester = new NBTItem(tester);
+        NBTCompound nbtCompound0 = nbtOriginal.getTag();
+        NBTCompound nbtCompound1 = nbtTester.getTag();
+        return nbtCompound0.equals(nbtCompound1);
+    }
+
+    public static int countItems(Inventory inventory, @NotNull ItemStack item) {
+        if (inventory == null) {
+            return 0;
+        }
+        int count = 0;
+        for (ItemStack itemStack : inventory) {
+            if (itemStack == null || itemStack.getType() == Material.AIR) {
+                continue;
+            }
+            if (matches(item, itemStack)) {
+                count+= itemStack.getAmount();
+            }
+        }
+        return count;
+    }
+
+    public static int countSpace(Inventory inventory, @NotNull ItemStack item) {
+        if (inventory == null) {
+            return 0;
+        }
+        int count = 0;
+        int itemMaxStackSize = item.getMaxStackSize();
+        for (ItemStack itemStack : inventory) {
+            if (itemStack == null || itemStack.getType() == Material.AIR) {
+                count+=itemMaxStackSize;
+            } else if (matches(item, itemStack)) {
+                count+=itemStack.getAmount() >= itemMaxStackSize ? 0 : itemMaxStackSize - itemStack.getAmount();
+            }
+        }
+        return count;
+    }
+
+    public static String getItemName(ItemStack itemStack) {
+        ItemMeta meta = itemStack.getItemMeta();
+        if (meta != null && meta.hasDisplayName()) {
+            return meta.getDisplayName();
+        }
+        Material material = itemStack.getType();
+        String id = material.name().toLowerCase();
+        boolean isBlock = material.isBlock();
+        String prefix = isBlock ? "block" : "item";
+        return LangUtil.getLang(prefix+".minecraft."+id);
+    }
+
+}
diff --git a/src/main/resources/plugin.yml b/src/main/resources/plugin.yml
index 109b955..5bb62e5 100644
--- a/src/main/resources/plugin.yml
+++ b/src/main/resources/plugin.yml
@@ -1,5 +1,5 @@
 name: AuLib
 main: com.io.yutian.aulib.AuLib
-version: 1.7.3
+version: 1.8
 api-version: 1.18
 author: SuperYuTian
\ No newline at end of file