diff --git a/SOPT-Stamp-iOS/Projects/Domain/Sources/UseCase/SignUpUseCase.swift b/SOPT-Stamp-iOS/Projects/Domain/Sources/UseCase/SignUpUseCase.swift
index a1c004b0..e5badc5e 100644
--- a/SOPT-Stamp-iOS/Projects/Domain/Sources/UseCase/SignUpUseCase.swift
+++ b/SOPT-Stamp-iOS/Projects/Domain/Sources/UseCase/SignUpUseCase.swift
@@ -6,16 +6,30 @@
 //  Copyright © 2022 SOPT-Stamp-iOS. All rights reserved.
 //
 
+import Foundation
 import Combine
 
 public protocol SignUpUseCase {
-
+    func checkNickname(nickname: String)
+    func checkEmail(email: String)
+    func checkPassword(password: String)
+    func checkAccordPassword(firstPassword: String, secondPassword: String)
+    
+    var isNicknameValid: PassthroughSubject<Bool, Error> { get set }
+    var isEmailFormValid: PassthroughSubject<Bool, Error> { get set }
+    var isPasswordFormValid: PassthroughSubject<Bool, Error> { get set }
+    var isAccordPassword: PassthroughSubject<Bool, Error> { get set }
 }
 
 public class DefaultSignUpUseCase {
   
     private let repository: SignUpRepositoryInterface
     private var cancelBag = Set<AnyCancellable>()
+    
+    public var isNicknameValid = PassthroughSubject<Bool, Error>()
+    public var isEmailFormValid = PassthroughSubject<Bool, Error>()
+    public var isPasswordFormValid = PassthroughSubject<Bool, Error>()
+    public var isAccordPassword = PassthroughSubject<Bool, Error>()
   
     public init(repository: SignUpRepositoryInterface) {
         self.repository = repository
@@ -23,5 +37,53 @@ public class DefaultSignUpUseCase {
 }
 
 extension DefaultSignUpUseCase: SignUpUseCase {
-  
+    public func checkNickname(nickname: String) {
+        // 닉네임 글자 수 정해지면 로직 추가
+        let isValid = checkNicknameForm(nickname: nickname)
+        guard isValid else { return }
+        // 서버 통신
+    }
+    
+    public func checkEmail(email: String) {
+        let isValid = checkEmailForm(email: email)
+        guard isValid else { return }
+        // 서버 통신
+    }
+    
+    public func checkPassword(password: String) {
+        checkPasswordForm(password: password)
+    }
+    
+    public func checkAccordPassword(firstPassword: String, secondPassword: String) {
+        checkAccordPasswordForm(firstPassword: firstPassword, secondPassword: secondPassword)
+    }
+}
+
+// MARK: - Methods
+
+extension DefaultSignUpUseCase {
+    func checkNicknameForm(nickname: String) -> Bool {
+        isNicknameValid.send(true)
+        return true
+    }
+    
+    func checkEmailForm(email: String) -> Bool {
+        let emailRegEx = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
+        let emailTest = NSPredicate(format: "SELF MATCHES %@", emailRegEx)
+        let isValid = emailTest.evaluate(with: email)
+        isEmailFormValid.send(isValid)
+        return isValid
+    }
+    
+    func checkPasswordForm(password: String) {
+        let passwordRegEx = "^(?=.*[A-Za-z])(?=.*[0-9])(?=.*[!@#$%^&*()_+=-]).{8,16}" // 8자리 ~ 16자리 영어+숫자+특수문자
+        let passwordTest = NSPredicate(format: "SELF MATCHES %@", passwordRegEx)
+        let isValid = passwordTest.evaluate(with: password)
+        isPasswordFormValid.send(isValid)
+    }
+    
+    func checkAccordPasswordForm(firstPassword: String, secondPassword: String) {
+        let isValid = (firstPassword == secondPassword)
+        isAccordPassword.send(isValid)
+    }
 }