diff --git a/codes/services.py b/codes/services.py
new file mode 100644
index 0000000..4449084
--- /dev/null
+++ b/codes/services.py
@@ -0,0 +1,82 @@
+import random
+import string
+import requests
+
+from django.db import IntegrityError
+from django.conf import settings
+from django.utils.timezone import now
+
+from rest_framework.views import APIView
+from rest_framework.response import Response
+from rest_framework import status
+
+from .models import CertificationCode
+
+from common.models.choiceModels import CertificateCodeUseType
+from common.utils.codeManger import set_expire
+
+from solapi import SolapiMessageService
+from solapi.model import RequestMessage
+
+# from .schemas import send_sms_post_schema  # Swagger나 drf-spectacular 등에 사용되는 데코레이터
+
+class CertificateService:
+    @staticmethod
+    def send(code, identifier):
+        pass
+
+    # 유효시간 5분 설정해서 저장, 이전 같은 번호 sms 요청 값들 is_used=True로 바꾸기
+    @staticmethod
+    def save_certificate_info(use_type: CertificateCodeUseType, code, identifier):
+        try:
+            befores = CertificationCode.objects.filter(
+                use_type=use_type, 
+                identifier=identifier, 
+                is_used=False
+                ).update(is_used=True)
+            instance = CertificationCode.objects.create(
+                use_type = use_type,
+                code = code,
+                expire_at = set_expire(5),
+                identifier = identifier
+            )
+            return True
+        except IntegrityError as e:
+            return False
+        
+    # code 체크 후 is_used=True로 설정
+    @staticmethod
+    def check_code(use_type: CertificateCodeUseType, code, identifier):
+        if check := CertificationCode.objects.filter(
+            use_type=use_type,
+            identifier=identifier,
+            is_used=False,
+            expire_at__gte=now()
+            ).order_by('-created_at').first():
+            
+            if check.code == code:
+                check.is_used=True
+                check.save()
+                return True
+        return False
+    
+class SmsService(CertificateService):
+    # 같은 전번에 대해 요청 텀 설정은 views 단에서 하자.
+    @staticmethod
+    def send(code, identifier):
+        message_service = SolapiMessageService(
+            api_key = settings.SOLAPI_API_KEY, api_secret = settings.SOLAPI_API_SECRET
+        )
+
+        message = RequestMessage(
+            from_ = settings.FROM_PHONE_NUMBER,
+            to = identifier,
+            text = "colio 서비스 회원가입 인증번호는 " + code +" 입니다."
+        )
+
+        try:
+            res = message_service.send(message)
+            return True
+        except Exception as e:
+            print(f"메시지 발송 실패: {str(e)}")
+            return False
\ No newline at end of file