diff --git a/.changeset/tasty-crabs-work.md b/.changeset/tasty-crabs-work.md
new file mode 100644
index 000000000..10ec8be36
--- /dev/null
+++ b/.changeset/tasty-crabs-work.md
@@ -0,0 +1,5 @@
+---
+'@modern-kit/utils': minor
+---
+
+fix(utils): deepCopy -> cloneDeep 네이밍 변경 및 기능 개선 - @ssi02014
diff --git a/docs/docs/utils/common/cloneDeep.md b/docs/docs/utils/common/cloneDeep.md
new file mode 100644
index 000000000..7e5023d1f
--- /dev/null
+++ b/docs/docs/utils/common/cloneDeep.md
@@ -0,0 +1,48 @@
+# cloneDeep
+
+인자로 주어진 값을 `깊은 복사`를 수행하는 함수입니다.
+
+<br />
+
+## Code
+[🔗 실제 구현 코드 확인](https://github.com/modern-agile-team/modern-kit/blob/main/packages/utils/src/common/cloneDeep/index.ts)
+
+## Benchmark
+- `hz`: 초당 작업 수
+- `mean`: 평균 응답 시간(ms)
+
+|이름|hz|mean|성능|
+|------|---|---|---|
+|modern-kit/cloneDeep|1,529,157.20|0.0007|`fastest`|
+|lodash/cloneDeep|650,320.39|0.0015|-|
+
+- **modern-kit/cloneDeep**
+  - `2.35x` faster than lodash/cloneDeep
+
+## Interface
+```ts title="typescript"
+function cloneDeep<T>(value: T): T
+```
+
+## Usage
+```ts title="typescript"
+import { cloneDeep } from '@modern-kit/utils';
+
+const originNum = 42;
+const copyNum = cloneDeep(originNum);
+
+const originObj = { a: 1, b: { c: 2 } };
+const copyObj = cloneDeep(originObj);
+
+const originArray = [1, 2, [3, 4]];
+const copyArray = cloneDeep(originArray);
+
+const originSet = new Set([1, 2, 3]);
+const copySet = cloneDeep(originSet);
+
+const originMap = new Map([
+  ['a', 1],
+  ['b', 2],
+]);
+const copyMap = cloneDeep(originMap);
+```
\ No newline at end of file
diff --git a/docs/docs/utils/common/deepCopy.md b/docs/docs/utils/common/deepCopy.md
deleted file mode 100644
index d9f3ce61b..000000000
--- a/docs/docs/utils/common/deepCopy.md
+++ /dev/null
@@ -1,36 +0,0 @@
-# deepCopy
-
-인자로 주어진 값을 `깊은 복사`를 수행하는 함수입니다.
-
-<br />
-
-## Code
-[🔗 실제 구현 코드 확인](https://github.com/modern-agile-team/modern-kit/blob/main/packages/utils/src/common/deepCopy/index.ts)
-
-## Interface
-```ts title="typescript"
-const deepCopy: <T>(value: T) => T
-```
-
-## Usage
-```ts title="typescript"
-import { deepCopy } from '@modern-kit/utils';
-
-const originNum = 42;
-const copyNum = deepCopy(originNum);
-
-const originObj = { a: 1, b: { c: 2 } };
-const copyObj = deepCopy(originObj);
-
-const originArray = [1, 2, [3, 4]];
-const copyArray = deepCopy(originArray);
-
-const originSet = new Set([1, 2, 3]);
-const copySet = deepCopy(originSet);
-
-const originMap = new Map([
-  ['a', 1],
-  ['b', 2],
-]);
-const copyMap = deepCopy(originMap);
-```
\ No newline at end of file
diff --git a/docs/docs/utils/object/omit.md b/docs/docs/utils/object/omit.md
index 28cdf16a9..2d69283f8 100644
--- a/docs/docs/utils/object/omit.md
+++ b/docs/docs/utils/object/omit.md
@@ -15,11 +15,11 @@
 
 |이름|hz|mean|성능|
 |------|---|---|---|
-|modern-kit/omit|3,567,312.89|0.0003|`fastest`|
-|lodash/omit|879,967.75|0.0011|-|
+|modern-kit/omit|1,505,400.16|0.0003|`fastest`|
+|lodash/omit|901,269.43|0.0011|-|
 
 - **modern-kit/omit**
-  - `4.05x` faster than lodash/omit
+  - `1.67x` faster than lodash/omit
 
 ## Interface
 ```ts title="typescript"
diff --git a/docs/docs/utils/object/pick.md b/docs/docs/utils/object/pick.md
index 3acb72300..758853ba5 100644
--- a/docs/docs/utils/object/pick.md
+++ b/docs/docs/utils/object/pick.md
@@ -2,8 +2,6 @@
 
 인자로 넣은 `keys`로 구성된 객체를 반환하는 함수입니다. 반환된 객체는 `깊은 복사된 새로운 객체`입니다.
 
-`symbol`은 제외됩니다.
-
 <br />
 
 ## Code
@@ -15,11 +13,11 @@
 
 |이름|hz|mean|성능|
 |------|---|---|---|
-|modern-kit/pick|5,663,602.36|0.0002|`fastest`|
-|lodash/pick|1,035,576.42|0.0010|-|
+|modern-kit/pick|1,693,028.73|0.0002|`fastest`|
+|lodash/pick|1,022,887.39|0.0010|-|
 
 - **modern-kit/pick**
-  - `4.05x` faster than lodash/pick
+  - `1.60x` faster than lodash/pick
 
 ## Interface
 ```ts title="typescript"
diff --git a/packages/utils/src/common/cloneDeep/cloneDeep.bench.ts b/packages/utils/src/common/cloneDeep/cloneDeep.bench.ts
new file mode 100644
index 000000000..7f9c1f792
--- /dev/null
+++ b/packages/utils/src/common/cloneDeep/cloneDeep.bench.ts
@@ -0,0 +1,13 @@
+import { bench, describe } from 'vitest';
+import { cloneDeep as cloneDeep } from '.';
+import { cloneDeep as cloneDeepLodash } from 'lodash-es';
+
+describe('cloneDeep', () => {
+  bench('@modern-kit/cloneDeep', () => {
+    cloneDeep({ a: 1, b: 2, c: { d: 4, e: [1, 2, 3] } });
+  });
+
+  bench('lodash/cloneDeep', () => {
+    cloneDeepLodash({ a: 1, b: 2, c: { d: 4, e: [1, 2, 3] } });
+  });
+});
diff --git a/packages/utils/src/common/deepCopy/deepCopy.spec.ts b/packages/utils/src/common/cloneDeep/cloneDeep.spec.ts
similarity index 76%
rename from packages/utils/src/common/deepCopy/deepCopy.spec.ts
rename to packages/utils/src/common/cloneDeep/cloneDeep.spec.ts
index ee5d045d4..796c72e61 100644
--- a/packages/utils/src/common/deepCopy/deepCopy.spec.ts
+++ b/packages/utils/src/common/cloneDeep/cloneDeep.spec.ts
@@ -1,17 +1,17 @@
 import { describe, it, expect } from 'vitest';
-import { deepCopy } from '.';
+import { cloneDeep } from '.';
 
-describe('deepCopy', () => {
+describe('cloneDeep', () => {
   it('should deeply copy a primitive value', () => {
     const originNum = 42;
-    const copiedNum = deepCopy(originNum);
+    const copiedNum = cloneDeep(originNum);
 
     expect(copiedNum).toBe(originNum);
   });
 
   it('should deeply copy an array', () => {
     const originArray = [1, 2, [3, 4]];
-    const copiedArray = deepCopy(originArray);
+    const copiedArray = cloneDeep(originArray);
 
     expect(copiedArray).toEqual(originArray);
     expect(copiedArray).not.toBe(originArray);
@@ -21,7 +21,7 @@ describe('deepCopy', () => {
     const originArray: any[] = [];
     originArray.push(originArray);
 
-    const copiedArr = deepCopy(originArray);
+    const copiedArr = cloneDeep(originArray);
 
     expect(copiedArr).toEqual(copiedArr[0]);
     expect(copiedArr).not.toBe(originArray);
@@ -32,7 +32,7 @@ describe('deepCopy', () => {
     const originObject = { origin: {} };
     originObject.origin = originObject;
 
-    const copiedObject = deepCopy(originObject);
+    const copiedObject = cloneDeep(originObject);
 
     expect(copiedObject).toEqual(copiedObject.origin);
     expect(copiedObject).not.toBe(originObject);
@@ -40,16 +40,17 @@ describe('deepCopy', () => {
   });
 
   it('should deeply copy an object', () => {
-    const originObj = { a: 1, b: { c: 2 } };
-    const copiedObj = deepCopy(originObj);
+    const originObj = { a: 1, b: { c: 2, d: [0, 1] } };
+    const copiedObj = cloneDeep(originObj);
 
     expect(copiedObj).toEqual(originObj);
     expect(copiedObj).not.toBe(originObj);
+    expect(copiedObj.b.d).not.toBe(originObj.b.d);
   });
 
   it('should deeply copy a set', () => {
     const originSet = new Set([1, 2, 3]);
-    const copiedSet = deepCopy(originSet);
+    const copiedSet = cloneDeep(originSet);
 
     expect(copiedSet).toEqual(originSet);
     expect(copiedSet).not.toBe(originSet);
@@ -60,7 +61,7 @@ describe('deepCopy', () => {
       ['a', 1],
       ['b', 2],
     ]);
-    const copiedMap = deepCopy(originMap);
+    const copiedMap = cloneDeep(originMap);
 
     expect(copiedMap).toEqual(originMap);
     expect(copiedMap).not.toBe(originMap);
@@ -68,7 +69,7 @@ describe('deepCopy', () => {
 
   it('should deeply copy a date', () => {
     const date = new Date();
-    const copiedDate = deepCopy(date);
+    const copiedDate = cloneDeep(date);
 
     expect(copiedDate.getTime()).toEqual(date.getTime());
     expect(copiedDate).not.toBe(date);
@@ -76,7 +77,7 @@ describe('deepCopy', () => {
 
   it('should deeply copy a regex', () => {
     const regex = /test/gi;
-    const copiedRegex = deepCopy(regex);
+    const copiedRegex = cloneDeep(regex);
 
     expect(copiedRegex.source).toEqual(regex.source);
     expect(copiedRegex.flags).toEqual(regex.flags);
diff --git a/packages/utils/src/common/deepCopy/index.ts b/packages/utils/src/common/cloneDeep/index.ts
similarity index 75%
rename from packages/utils/src/common/deepCopy/index.ts
rename to packages/utils/src/common/cloneDeep/index.ts
index 0632c0f9a..837d769b5 100644
--- a/packages/utils/src/common/deepCopy/index.ts
+++ b/packages/utils/src/common/cloneDeep/index.ts
@@ -1,4 +1,4 @@
-export function deepCopy<T>(value: T) {
+export function cloneDeep<T>(value: T) {
   const referenceMap = new WeakMap();
 
   const copyWthRecursion = (target: T): T => {
@@ -14,11 +14,11 @@ export function deepCopy<T>(value: T) {
 
     // Array
     if (Array.isArray(target)) {
-      const newArray: any[] = [];
-
+      const newArray = new Array(target.length);
       referenceMap.set(target, newArray);
-      for (const item of target) {
-        newArray.push(copyWthRecursion(item));
+
+      for (let i = 0; i < target.length; i++) {
+        newArray[i] = copyWthRecursion(target[i]);
       }
       return newArray as T;
     }
@@ -26,8 +26,8 @@ export function deepCopy<T>(value: T) {
     // Set
     if (target instanceof Set) {
       const newSet = new Set();
-
       referenceMap.set(target, newSet);
+
       for (const item of target) {
         newSet.add(copyWthRecursion(item));
       }
@@ -52,18 +52,21 @@ export function deepCopy<T>(value: T) {
 
     // RegExp
     if (target instanceof RegExp) {
-      return new RegExp(target.source, target.flags) as T;
+      const result = new RegExp(target.source, target.flags);
+      result.lastIndex = target.lastIndex;
+
+      return result as T;
     }
 
     // Object
-    const newObject: Record<PropertyKey, any> = Object.create(
-      Object.getPrototypeOf(target)
-    );
-
+    const newObject: Record<PropertyKey, any> = {};
     referenceMap.set(target, newObject);
+
     const keys = Reflect.ownKeys(target); // symbol 유지
 
-    for (const key of keys) {
+    for (let i = 0; i < keys.length; i++) {
+      const key = keys[i];
+
       newObject[key] = copyWthRecursion(
         (target as Record<PropertyKey, any>)[key]
       );
diff --git a/packages/utils/src/common/index.ts b/packages/utils/src/common/index.ts
index 5209ce5a0..15594ef2a 100644
--- a/packages/utils/src/common/index.ts
+++ b/packages/utils/src/common/index.ts
@@ -1,6 +1,6 @@
 export * from './abRandom';
 export * from './asyncNoop';
-export * from './deepCopy';
+export * from './cloneDeep';
 export * from './delay';
 export * from './getUniqId';
 export * from './getUniqTime';
diff --git a/packages/utils/src/common/wrapInArray/index.ts b/packages/utils/src/common/wrapInArray/index.ts
index c1778ef9f..faec0c547 100644
--- a/packages/utils/src/common/wrapInArray/index.ts
+++ b/packages/utils/src/common/wrapInArray/index.ts
@@ -1,7 +1,7 @@
-import { deepCopy } from '../deepCopy';
+import { cloneDeep } from '../cloneDeep';
 
 export function wrapInArray<T>(value: T | T[]): T[] {
-  const copiedValue = deepCopy(value);
+  const copiedValue = cloneDeep(value);
 
   return Array.isArray(copiedValue) ? copiedValue : [copiedValue];
 }
diff --git a/packages/utils/src/object/omit/index.ts b/packages/utils/src/object/omit/index.ts
index a71af6099..b4420f828 100644
--- a/packages/utils/src/object/omit/index.ts
+++ b/packages/utils/src/object/omit/index.ts
@@ -1,3 +1,5 @@
+import { cloneDeep } from '../../common';
+
 /**
  * @description 주어진 객체에서 지정된 키들을 제거한 새로운 객체를 반환하는 함수입니다.
  *
@@ -17,7 +19,7 @@ export function omit<T extends Record<PropertyKey, any>, K extends keyof T>(
   obj: T,
   keys: K[] | readonly K[]
 ): Omit<T, K> {
-  const result = { ...obj };
+  const result = cloneDeep(obj);
 
   for (let i = 0; i < keys.length; i++) {
     const key = keys[i];
diff --git a/packages/utils/src/object/pick/index.ts b/packages/utils/src/object/pick/index.ts
index 670641eba..af814d08b 100644
--- a/packages/utils/src/object/pick/index.ts
+++ b/packages/utils/src/object/pick/index.ts
@@ -1,3 +1,5 @@
+import { cloneDeep } from '../../common';
+
 /**
  * @description 주어진 객체에서 지정된 키들만을 선택하여 새로운 객체를 반환하는 함수입니다.
  *
@@ -23,7 +25,7 @@ export function pick<T extends Record<PropertyKey, any>, K extends keyof T>(
   keys: K[] | readonly K[]
 ): Pick<T, K> {
   const result = {} as T;
-  const copiedObj = { ...obj };
+  const copiedObj = cloneDeep(obj);
 
   for (let i = 0; i < keys.length; i++) {
     const key = keys[i];