diff --git a/packages-user/data-base/src/hero/equipment.ts b/packages-user/data-base/src/hero/equipment.ts
index 454ba79..65d8267 100644
--- a/packages-user/data-base/src/hero/equipment.ts
+++ b/packages-user/data-base/src/hero/equipment.ts
@@ -261,12 +261,8 @@ export class HeroEquipment<THero> implements IHeroEquipment<THero> {
     ): Readonly<Partial<THero>> {
         const stateA = this.store.get(equipA);
         const stateB = this.store.get(equipB);
-        if (!stateA) {
-            logger.warn(146, equipA.toString());
-            return {} as Partial<THero>;
-        }
-        if (!stateB) {
-            logger.warn(146, equipB.toString());
+        if (!stateA && !stateB) {
+            logger.warn(195, equipA.toString(), equipB.toString());
             return {} as Partial<THero>;
         }
 
@@ -296,7 +292,7 @@ export class HeroEquipment<THero> implements IHeroEquipment<THero> {
         const attrB: Partial<THero> = {};
         const keys = new Set<SelectKey<THero, number>>();
 
-        const modifiersA = [...stateA.getModifiers()];
+        const modifiersA = stateA ? [...stateA.getModifiers()] : [];
         const addedA: typeof modifiersA = [];
         for (const [name, modifier] of modifiersA) {
             const copy = modifier.clone();
@@ -304,7 +300,7 @@ export class HeroEquipment<THero> implements IHeroEquipment<THero> {
             clone.addModifier(name, copy);
             addedA.push([name, copy]);
         }
-        for (const [name] of stateA.getModifiers()) {
+        for (const [name] of modifiersA) {
             attrA[name] = clone.getFinalAttribute(name);
             keys.add(name);
         }
@@ -313,12 +309,13 @@ export class HeroEquipment<THero> implements IHeroEquipment<THero> {
             clone.deleteModifier(name, copy);
         }
 
-        for (const [name, modifier] of stateB.getModifiers()) {
+        const modifiersB = stateB ? [...stateB.getModifiers()] : [];
+        for (const [name, modifier] of modifiersB) {
             const copy = modifier.clone();
             // @ts-expect-error 泛型无法推导
             clone.addModifier(name, copy);
         }
-        for (const [name] of stateB.getModifiers()) {
+        for (const [name] of modifiersB) {
             attrB[name] = clone.getFinalAttribute(name);
             keys.add(name);
         }
diff --git a/packages-user/data-base/src/hero/types.ts b/packages-user/data-base/src/hero/types.ts
index 883e53c..6220d18 100644
--- a/packages-user/data-base/src/hero/types.ts
+++ b/packages-user/data-base/src/hero/types.ts
@@ -865,8 +865,8 @@ export interface IHeroEquipment<THero>
 
     /**
      * 比较两个装备在指定槽位的表现，输出装备 A 时的属性减装备 B 时的属性
-     * @param equipA 要比较的装备 A 的 uid
-     * @param equipB 要比较的装备 B 的 uid
+     * @param equipA 要比较的装备 A 的 uid，填写 -1 表示无装备
+     * @param equipB 要比较的装备 B 的 uid，填写 -1 表示无装备
      * @param slot 要比较的装备槽索引
      */
     compareEquip(
diff --git a/packages/common/src/logger.json b/packages/common/src/logger.json
index 2a16b8e..37865ba 100644
--- a/packages/common/src/logger.json
+++ b/packages/common/src/logger.json
@@ -278,6 +278,7 @@
         "192": "A FaceGroup.Dir8 face handler registration is expected.",
         "193": "Cannot load item state since no item id registration for item num $1.",
         "194": "Expected passive replay command executed during the last active replay command executing, but a passive command $1 was got after active replay command $2 executing. Replay will continue and ignore this issue.",
+        "195": "Cannot compare equipments since both equipments not exists. Equip A: $1, Equip B: $2.",
         "1001": "Event(setBlock): Unknown tile '$1' when setting block."
     }
 }