diff --git a/src/main/kotlin/com/psr/psr/cs/dto/assembler/CsAssembler.kt b/src/main/kotlin/com/psr/psr/cs/dto/assembler/CsAssembler.kt
deleted file mode 100644
index 3153f1f..0000000
--- a/src/main/kotlin/com/psr/psr/cs/dto/assembler/CsAssembler.kt
+++ /dev/null
@@ -1,50 +0,0 @@
-package com.psr.psr.cs.dto.assembler
-
-import com.psr.psr.cs.dto.response.FaqListRes
-import com.psr.psr.cs.dto.response.FaqRes
-import com.psr.psr.cs.dto.response.NoticeListRes
-import com.psr.psr.cs.dto.response.NoticeRes
-import com.psr.psr.cs.entity.Faq
-import com.psr.psr.cs.entity.Notice
-import org.springframework.stereotype.Component
-import java.util.stream.Collectors
-
-@Component
-class CsAssembler {
-
-    // 공지사항 메인
-    fun toNoticeListRes(noticeList: List<Notice>?): NoticeListRes {
-        if (noticeList!!.isEmpty()) return NoticeListRes(null)
-        return NoticeListRes(noticeList.stream().map {
-            n -> NoticeRes(n.id, n.title, n.createdAt)
-        }.collect(Collectors.toList()))
-    }
-
-    // 공지사항 상세
-    fun toNoticeRes(notice: Notice): NoticeRes {
-        return NoticeRes(notice.id, notice.title, notice.createdAt, notice.imgUrl, notice.content)
-    }
-
-    // 자주 묻는 질문 메인
-    fun toFaqListRes(faqList: List<Faq>?) : FaqListRes {
-        if(faqList!!.isEmpty()) return FaqListRes(null)
-        return FaqListRes(faqList.stream().map {
-            f -> FaqRes(f.id, f.type.value, f.title)
-        }.collect(Collectors.toList()))
-    }
-
-    // 자주 묻는 질문 상세
-    fun toFaqRes(faq: Faq): FaqRes {
-        return FaqRes(faq.id, faq.type.value, faq.title, faq.content)
-    }
-
-    fun toNoticeListResForHomePage(noticeList: List<Notice>?): NoticeListRes {
-        return NoticeListRes(
-            noticeLists = noticeList?.map { n -> toNoticeResHome(n) }!!.toList()
-        )
-    }
-
-    fun toNoticeResHome(notice: Notice): NoticeRes {
-        return NoticeRes(noticeId = notice.id, title = notice.title)
-    }
-}
\ No newline at end of file
diff --git a/src/main/kotlin/com/psr/psr/cs/dto/response/FaqListRes.kt b/src/main/kotlin/com/psr/psr/cs/dto/response/FaqListRes.kt
index e3609bb..67e921d 100644
--- a/src/main/kotlin/com/psr/psr/cs/dto/response/FaqListRes.kt
+++ b/src/main/kotlin/com/psr/psr/cs/dto/response/FaqListRes.kt
@@ -1,5 +1,17 @@
 package com.psr.psr.cs.dto.response
 
+import com.psr.psr.cs.entity.Faq
+import java.util.stream.Collectors
+
 data class FaqListRes (
     val faqLists: List<FaqRes>?
-)
\ No newline at end of file
+){
+    companion object{
+        fun toFaqListRes(faqList: List<Faq>?) : FaqListRes {
+            if(faqList!!.isEmpty()) return FaqListRes(null)
+            return FaqListRes(faqList.stream().map {
+                    f -> FaqRes(f.id, f.type.value, f.title)
+            }.collect(Collectors.toList()))
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/psr/psr/cs/dto/response/FaqRes.kt b/src/main/kotlin/com/psr/psr/cs/dto/response/FaqRes.kt
index 81e4703..cf1fdda 100644
--- a/src/main/kotlin/com/psr/psr/cs/dto/response/FaqRes.kt
+++ b/src/main/kotlin/com/psr/psr/cs/dto/response/FaqRes.kt
@@ -1,6 +1,7 @@
 package com.psr.psr.cs.dto.response
 
 import com.fasterxml.jackson.annotation.JsonInclude
+import com.psr.psr.cs.entity.Faq
 
 data class FaqRes (
     val faqId: Long,
@@ -8,4 +9,10 @@ data class FaqRes (
     val title: String,
     @JsonInclude(JsonInclude.Include.NON_NULL)
     val content: String?= null,
-)
\ No newline at end of file
+){
+    companion object{
+        fun toFaqRes(faq: Faq): FaqRes {
+            return FaqRes(faq.id, faq.type.value, faq.title, faq.content)
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/psr/psr/cs/dto/response/NoticeListRes.kt b/src/main/kotlin/com/psr/psr/cs/dto/response/NoticeListRes.kt
index 9d92900..97a960d 100644
--- a/src/main/kotlin/com/psr/psr/cs/dto/response/NoticeListRes.kt
+++ b/src/main/kotlin/com/psr/psr/cs/dto/response/NoticeListRes.kt
@@ -1,5 +1,24 @@
 package com.psr.psr.cs.dto.response
 
+import com.psr.psr.cs.dto.response.NoticeRes.Companion.toNoticeResHome
+import com.psr.psr.cs.entity.Notice
+import java.util.stream.Collectors
+
 data class NoticeListRes (
     val noticeLists: List<NoticeRes>?
-)
\ No newline at end of file
+){
+    companion object{
+        fun toNoticeListRes(noticeList: List<Notice>?): NoticeListRes {
+            if (noticeList!!.isEmpty()) return NoticeListRes(null)
+            return NoticeListRes(noticeList.stream().map {
+                    n -> NoticeRes(n.id, n.title, n.createdAt)
+            }.collect(Collectors.toList()))
+        }
+
+        fun toNoticeListResForHomePage(noticeList: List<Notice>?): NoticeListRes {
+            return NoticeListRes(
+                noticeLists = noticeList?.map { n -> toNoticeResHome(n) }!!.toList()
+            )
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/psr/psr/cs/dto/response/NoticeRes.kt b/src/main/kotlin/com/psr/psr/cs/dto/response/NoticeRes.kt
index fac8ab0..d935628 100644
--- a/src/main/kotlin/com/psr/psr/cs/dto/response/NoticeRes.kt
+++ b/src/main/kotlin/com/psr/psr/cs/dto/response/NoticeRes.kt
@@ -2,6 +2,7 @@ package com.psr.psr.cs.dto.response
 
 import com.fasterxml.jackson.annotation.JsonFormat
 import com.fasterxml.jackson.annotation.JsonInclude
+import com.psr.psr.cs.entity.Notice
 import java.time.LocalDateTime
 
 data class NoticeRes (
@@ -14,4 +15,14 @@ data class NoticeRes (
     val imgUrl: String ?= null,
     @JsonInclude(JsonInclude.Include.NON_NULL)
     val content: String ?= null
-)
\ No newline at end of file
+){
+    companion object{
+        fun toNoticeRes(notice: Notice): NoticeRes {
+            return NoticeRes(notice.id, notice.title, notice.createdAt, notice.imgUrl, notice.content)
+        }
+
+        fun toNoticeResHome(notice: Notice): NoticeRes {
+            return NoticeRes(noticeId = notice.id, title = notice.title)
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/psr/psr/cs/service/CsService.kt b/src/main/kotlin/com/psr/psr/cs/service/CsService.kt
index 6d718a8..a7dba73 100644
--- a/src/main/kotlin/com/psr/psr/cs/service/CsService.kt
+++ b/src/main/kotlin/com/psr/psr/cs/service/CsService.kt
@@ -4,7 +4,6 @@ import com.psr.psr.cs.dto.response.FaqListRes
 import com.psr.psr.cs.dto.response.FaqRes
 import com.psr.psr.cs.dto.response.NoticeListRes
 import com.psr.psr.cs.dto.response.NoticeRes
-import com.psr.psr.cs.dto.assembler.CsAssembler
 import com.psr.psr.cs.entity.FaqType
 import com.psr.psr.cs.repository.FaqRepository
 import com.psr.psr.cs.repository.NoticeRepository
@@ -17,37 +16,35 @@ import org.springframework.stereotype.Service
 class CsService(
         private val faqRepository: FaqRepository,
         private val noticeRepository: NoticeRepository,
-        private val csAssembler: CsAssembler
 
 ) {
         // 공지사항 메인
         fun getNotices() : NoticeListRes {
-                return csAssembler.toNoticeListRes(noticeRepository.findByStatusOrderByCreatedAtDesc(ACTIVE_STATUS))
+                return NoticeListRes.toNoticeListRes(noticeRepository.findByStatusOrderByCreatedAtDesc(ACTIVE_STATUS))
         }
 
         // 공지사항 상세
         fun getNotice(noticeId: Long) : NoticeRes {
                 val notice = noticeRepository.findByIdAndStatus(noticeId, ACTIVE_STATUS) ?: throw BaseException(BaseResponseCode.NOT_FOUND_NOTICE)
-                return csAssembler.toNoticeRes(notice)
+                return NoticeRes.toNoticeRes(notice)
         }
 
         // 자주 묻는 질문 메인
         fun getFaqs(type: String?): FaqListRes {
-                return if(type == null) csAssembler.toFaqListRes(faqRepository.findByStatusOrderByCreatedAtDesc(ACTIVE_STATUS))
+                return if(type == null) FaqListRes.toFaqListRes(faqRepository.findByStatusOrderByCreatedAtDesc(ACTIVE_STATUS))
                 else{
-                        csAssembler.toFaqListRes(faqRepository.findByTypeAndStatusOrderByCreatedAtDesc(FaqType.getTypeByName(type), ACTIVE_STATUS))
+                        FaqListRes.toFaqListRes(faqRepository.findByTypeAndStatusOrderByCreatedAtDesc(FaqType.getTypeByName(type), ACTIVE_STATUS))
                 }
         }
 
         // 자주 묻는 질문 상세
         fun getFaq(faqId: Long): FaqRes {
                 val faq = faqRepository.findByIdAndStatus(faqId, ACTIVE_STATUS) ?: throw BaseException(BaseResponseCode.NOT_FOUND_FAQ)
-                return csAssembler.toFaqRes(faq)
+                return FaqRes.toFaqRes(faq)
         }
 
         // 홈 화면 조회 - 공지사항
         fun getHomePage(): NoticeListRes {
-                return csAssembler.toNoticeListResForHomePage(noticeRepository.findTop3ByStatusOrderByCreatedAtDesc(ACTIVE_STATUS))
-    }
-
+                return NoticeListRes.toNoticeListResForHomePage(noticeRepository.findTop3ByStatusOrderByCreatedAtDesc(ACTIVE_STATUS))
+        }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/com/psr/psr/global/jwt/dto/TokenDto.kt b/src/main/kotlin/com/psr/psr/global/jwt/dto/TokenDto.kt
index 4c71c38..a3f2d4a 100644
--- a/src/main/kotlin/com/psr/psr/global/jwt/dto/TokenDto.kt
+++ b/src/main/kotlin/com/psr/psr/global/jwt/dto/TokenDto.kt
@@ -1,5 +1,6 @@
 package com.psr.psr.global.jwt.dto
 
+import com.psr.psr.global.Constant
 import org.jetbrains.annotations.NotNull
 
 data class TokenDto(
@@ -8,4 +9,11 @@ data class TokenDto(
     @field:NotNull
     var refreshToken: String,
     val type: String ?= null
-)
+){
+    companion object{
+        fun toTokenDto(tokenDto: TokenDto) {
+            tokenDto.accessToken.replace(Constant.JWT.BEARER_PREFIX, "").also { tokenDto.accessToken = it }
+            tokenDto.refreshToken.replace(Constant.JWT.BEARER_PREFIX, "").also { tokenDto.refreshToken = it }
+        }
+    }
+}
diff --git a/src/main/kotlin/com/psr/psr/user/dto/UserInterestListDto.kt b/src/main/kotlin/com/psr/psr/user/dto/UserInterestListDto.kt
index 4980c93..bfe311d 100644
--- a/src/main/kotlin/com/psr/psr/user/dto/UserInterestListDto.kt
+++ b/src/main/kotlin/com/psr/psr/user/dto/UserInterestListDto.kt
@@ -1,5 +1,15 @@
 package com.psr.psr.user.dto
 
+import com.psr.psr.user.entity.UserInterest
+
 data class UserInterestListDto (
     val interestList: List<UserInterestDto>?
-)
\ No newline at end of file
+){
+    companion object{
+        fun toUserInterestListDto(interests: List<UserInterest>?): UserInterestListDto {
+            return UserInterestListDto(
+                interestList = interests?.map { i -> UserInterestDto(i.category.value) }?.toList()
+            )
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/psr/psr/user/dto/assembler/UserAssembler.kt b/src/main/kotlin/com/psr/psr/user/dto/assembler/UserAssembler.kt
deleted file mode 100644
index b842131..0000000
--- a/src/main/kotlin/com/psr/psr/user/dto/assembler/UserAssembler.kt
+++ /dev/null
@@ -1,113 +0,0 @@
-package com.psr.psr.user.dto.assembler
-
-import com.psr.psr.global.Constant
-import com.psr.psr.global.jwt.dto.TokenDto
-import com.psr.psr.user.dto.UserInterestDto
-import com.psr.psr.user.dto.UserInterestListDto
-import com.psr.psr.user.dto.eidReq.Business
-import com.psr.psr.user.dto.eidReq.BusinessListReq
-import com.psr.psr.user.dto.phoneReq.MessageReq
-import com.psr.psr.user.dto.phoneReq.SMSReq
-import com.psr.psr.user.dto.request.SignUpReq
-import com.psr.psr.user.dto.request.UserEidReq
-import com.psr.psr.user.dto.request.ValidPhoneReq
-import com.psr.psr.user.dto.response.EmailRes
-import com.psr.psr.user.dto.response.MyPageInfoRes
-import com.psr.psr.user.dto.response.ProfileRes
-import com.psr.psr.user.entity.*
-import org.apache.commons.lang3.RandomStringUtils
-import org.springframework.stereotype.Component
-import java.time.LocalDate
-import java.time.format.DateTimeFormatter
-import java.util.*
-import java.util.stream.Collectors
-
-@Component
-class UserAssembler {
-    /**
-     * toEntity
-     */
-    fun toEntity(signUpReq: SignUpReq): User {
-        return User(email = signUpReq.email,
-            password = signUpReq.password,
-            type = Type.getTypeByValue(signUpReq.type),
-            phone = signUpReq.phone,
-            imgUrl = signUpReq.imgUrl,
-            provider = Provider.LOCAL,
-            marketing = signUpReq.marketing,
-            notification = signUpReq.notification,
-            name = signUpReq.name,
-            nickname = signUpReq.nickname,
-            deviceToken = signUpReq.deviceToken)
-    }
-
-    fun toInterestListEntity(user: User, signUpReq: SignUpReq): List<UserInterest> {
-        return signUpReq.interestList.stream()
-            .map { i ->
-                UserInterest(category = Category.getCategoryByValue(i.category),
-                    user = user)
-            }.collect(Collectors.toList())
-    }
-
-    fun toInterestEntity(user: User, category: Category): UserInterest {
-        return UserInterest(user = user,
-            category = category)
-    }
-
-    fun toBusinessEntity(user: User, signUpReq: SignUpReq): BusinessInfo {
-        val format = DateTimeFormatter.ofPattern("yyyyMMdd")
-        return BusinessInfo(user = user,
-            companyName = signUpReq.entreInfo!!.companyName,
-            ownerName = signUpReq.entreInfo.ownerName,
-            number = signUpReq.entreInfo.number,
-            date = LocalDate.parse(signUpReq.entreInfo.companyDate, format)
-        )
-    }
-
-    fun toUserEidList(userEidReq: UserEidReq): BusinessListReq {
-        val business = Business(userEidReq.number, userEidReq.companyDate, userEidReq.ownerName, userEidReq.companyName)
-        return BusinessListReq(Collections.singletonList(business))
-    }
-
-    /**
-     * toDto
-     */
-    fun toMyPageInfoRes(user: User) : MyPageInfoRes {
-        return MyPageInfoRes(user.email, user.imgUrl, user.type.value, user.phone, user.nickname)
-    }
-
-    fun toProfileRes(user: User) : ProfileRes {
-        return ProfileRes(user.nickname, user.imgUrl)
-    }
-
-    fun toTokenDto(tokenDto: TokenDto) {
-        tokenDto.accessToken.replace(Constant.JWT.BEARER_PREFIX, "").also { tokenDto.accessToken = it }
-        tokenDto.refreshToken.replace(Constant.JWT.BEARER_PREFIX, "").also { tokenDto.refreshToken = it }
-    }
-
-    fun toSMSReqDto(validPhoneReq: ValidPhoneReq, key: String, sendPhone: String) : SMSReq{
-        val message = MessageReq(to = validPhoneReq.phone)
-        return SMSReq(
-            from = sendPhone,
-            content = "[PSR] 인증번호는 [ $key ] 을 입력해주세요",
-            messages = listOf(message) // 싱글톤 list = Collections.singletonList()
-        )
-    }
-
-    fun toEmailResDto(user: User): EmailRes {
-        return EmailRes(email = user.email)
-    }
-
-    fun toUserInterestListDto(interests: List<UserInterest>?): UserInterestListDto {
-        return UserInterestListDto(
-            interestList = interests?.map { i -> UserInterestDto(i.category.value) }?.toList()
-        )
-    }
-
-    /**
-     * Utils
-     */
-    fun createSmsKey() : String{
-        return RandomStringUtils.random(5, false, true);
-    }
-}
\ No newline at end of file
diff --git a/src/main/kotlin/com/psr/psr/user/dto/eidReq/BusinessListReq.kt b/src/main/kotlin/com/psr/psr/user/dto/eidReq/BusinessListReq.kt
index 0106e93..5708d6b 100644
--- a/src/main/kotlin/com/psr/psr/user/dto/eidReq/BusinessListReq.kt
+++ b/src/main/kotlin/com/psr/psr/user/dto/eidReq/BusinessListReq.kt
@@ -1,10 +1,17 @@
 package com.psr.psr.user.dto.eidReq
 
+import com.psr.psr.user.dto.request.UserEidReq
 import jakarta.validation.constraints.NotBlank
+import java.util.*
 
 data class BusinessListReq (
     @field:NotBlank
     val businesses: List<Business>
 ){
-
+    companion object{
+        fun toUserEidList(userEidReq: UserEidReq): BusinessListReq {
+            val business = Business(userEidReq.number, userEidReq.companyDate, userEidReq.ownerName, userEidReq.companyName)
+            return BusinessListReq(Collections.singletonList(business))
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/com/psr/psr/user/dto/phoneReq/SMSReq.kt b/src/main/kotlin/com/psr/psr/user/dto/phoneReq/SMSReq.kt
index efd2f2f..5d1c697 100644
--- a/src/main/kotlin/com/psr/psr/user/dto/phoneReq/SMSReq.kt
+++ b/src/main/kotlin/com/psr/psr/user/dto/phoneReq/SMSReq.kt
@@ -1,5 +1,7 @@
 package com.psr.psr.user.dto.phoneReq
 
+import com.psr.psr.user.dto.request.ValidPhoneReq
+
 data class SMSReq (
     val type: String?= "SMS",
     val contentType: String?="COMM",
@@ -7,4 +9,15 @@ data class SMSReq (
     val from: String,
     val content: String,
     val messages: List<MessageReq>
-)
\ No newline at end of file
+){
+    companion object{
+        fun toSMSReqDto(validPhoneReq: ValidPhoneReq, key: String, sendPhone: String) : SMSReq{
+            val message = MessageReq(to = validPhoneReq.phone)
+            return SMSReq(
+                from = sendPhone,
+                content = "[PSR] 인증번호는 [ $key ] 을 입력해주세요",
+                messages = listOf(message) // 싱글톤 list = Collections.singletonList()
+            )
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/psr/psr/user/dto/response/EmailRes.kt b/src/main/kotlin/com/psr/psr/user/dto/response/EmailRes.kt
index 1454e16..682a334 100644
--- a/src/main/kotlin/com/psr/psr/user/dto/response/EmailRes.kt
+++ b/src/main/kotlin/com/psr/psr/user/dto/response/EmailRes.kt
@@ -1,6 +1,14 @@
 package com.psr.psr.user.dto.response
 
+import com.psr.psr.user.entity.User
+
 
 data class EmailRes(
     val email: String,
-)
\ No newline at end of file
+){
+    companion object{
+        fun toEmailResDto(user: User): EmailRes {
+            return EmailRes(email = user.email)
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/psr/psr/user/dto/response/MyPageInfoRes.kt b/src/main/kotlin/com/psr/psr/user/dto/response/MyPageInfoRes.kt
index 605326c..35cc25a 100644
--- a/src/main/kotlin/com/psr/psr/user/dto/response/MyPageInfoRes.kt
+++ b/src/main/kotlin/com/psr/psr/user/dto/response/MyPageInfoRes.kt
@@ -1,5 +1,7 @@
 package com.psr.psr.user.dto.response
 
+import com.psr.psr.user.entity.User
+
 
 data class MyPageInfoRes(
     val email: String,
@@ -7,4 +9,10 @@ data class MyPageInfoRes(
     val type: String,
     val phone: String,
     val nickname: String,
-)
\ No newline at end of file
+){
+    companion object{
+        fun toMyPageInfoRes(user: User) : MyPageInfoRes {
+            return MyPageInfoRes(user.email, user.imgUrl, user.type.value, user.phone, user.nickname)
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/psr/psr/user/dto/response/ProfileRes.kt b/src/main/kotlin/com/psr/psr/user/dto/response/ProfileRes.kt
index e997d5b..e3c6186 100644
--- a/src/main/kotlin/com/psr/psr/user/dto/response/ProfileRes.kt
+++ b/src/main/kotlin/com/psr/psr/user/dto/response/ProfileRes.kt
@@ -1,7 +1,15 @@
 package com.psr.psr.user.dto.response
 
+import com.psr.psr.user.entity.User
+
 
 data class ProfileRes(
     val nickname: String,
     val imgUrl: String? = null
-)
\ No newline at end of file
+){
+    companion object{
+        fun toProfileRes(user: User) : ProfileRes {
+            return ProfileRes(user.nickname, user.imgUrl)
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/psr/psr/user/entity/BusinessInfo.kt b/src/main/kotlin/com/psr/psr/user/entity/BusinessInfo.kt
index 7e52c12..204196e 100644
--- a/src/main/kotlin/com/psr/psr/user/entity/BusinessInfo.kt
+++ b/src/main/kotlin/com/psr/psr/user/entity/BusinessInfo.kt
@@ -1,10 +1,12 @@
 package com.psr.psr.user.entity
 
 import com.psr.psr.global.entity.BaseEntity
+import com.psr.psr.user.dto.request.SignUpReq
 import jakarta.persistence.*
 import org.hibernate.annotations.SQLDelete
 import org.jetbrains.annotations.NotNull
 import java.time.LocalDate
+import java.time.format.DateTimeFormatter
 
 @Entity
 @SQLDelete(sql = "UPDATE business_info SET status = 'inactive', updated_at = current_timestamp WHERE id = ?")
@@ -27,4 +29,16 @@ data class BusinessInfo(
 
         @NotNull
         var date: LocalDate
-): BaseEntity()
+): BaseEntity(){
+        companion object{
+                fun toBusinessEntity(user: User, signUpReq: SignUpReq): BusinessInfo {
+                        val format = DateTimeFormatter.ofPattern("yyyyMMdd")
+                        return BusinessInfo(user = user,
+                                companyName = signUpReq.entreInfo!!.companyName,
+                                ownerName = signUpReq.entreInfo.ownerName,
+                                number = signUpReq.entreInfo.number,
+                                date = LocalDate.parse(signUpReq.entreInfo.companyDate, format)
+                        )
+                }
+        }
+}
diff --git a/src/main/kotlin/com/psr/psr/user/entity/User.kt b/src/main/kotlin/com/psr/psr/user/entity/User.kt
index 74aa061..60921f1 100644
--- a/src/main/kotlin/com/psr/psr/user/entity/User.kt
+++ b/src/main/kotlin/com/psr/psr/user/entity/User.kt
@@ -3,6 +3,7 @@ package com.psr.psr.user.entity
 import com.psr.psr.global.entity.BaseEntity
 import com.psr.psr.global.entityListener.UserEntityListener
 import com.psr.psr.product.entity.Product
+import com.psr.psr.user.dto.request.SignUpReq
 import jakarta.persistence.*
 import org.hibernate.annotations.DynamicInsert
 import org.hibernate.annotations.DynamicUpdate
@@ -65,4 +66,20 @@ class User(
         @Where(clause = "status = 'active'")
         var interests: List<UserInterest>? = ArrayList()
 
-): BaseEntity()
+): BaseEntity(){
+        companion object{
+                fun toEntity(signUpReq: SignUpReq): User {
+                        return User(email = signUpReq.email,
+                                password = signUpReq.password,
+                                type = Type.getTypeByValue(signUpReq.type),
+                                phone = signUpReq.phone,
+                                imgUrl = signUpReq.imgUrl,
+                                provider = Provider.LOCAL,
+                                marketing = signUpReq.marketing,
+                                notification = signUpReq.notification,
+                                name = signUpReq.name,
+                                nickname = signUpReq.nickname,
+                                deviceToken = signUpReq.deviceToken)
+                }
+        }
+}
diff --git a/src/main/kotlin/com/psr/psr/user/entity/UserInterest.kt b/src/main/kotlin/com/psr/psr/user/entity/UserInterest.kt
index 19397e9..28fb4bd 100644
--- a/src/main/kotlin/com/psr/psr/user/entity/UserInterest.kt
+++ b/src/main/kotlin/com/psr/psr/user/entity/UserInterest.kt
@@ -1,9 +1,11 @@
 package com.psr.psr.user.entity
 
 import com.psr.psr.global.entity.BaseEntity
+import com.psr.psr.user.dto.request.SignUpReq
 import jakarta.persistence.*
 import org.hibernate.annotations.SQLDelete
 import org.jetbrains.annotations.NotNull
+import java.util.stream.Collectors
 
 @Entity
 @SQLDelete(sql = "UPDATE user_interest SET status = 'inactive', updated_at = current_timestamp WHERE id = ?")
@@ -19,4 +21,19 @@ data class UserInterest(
         @Enumerated(EnumType.STRING)
         var category: Category
 
-): BaseEntity()
+): BaseEntity(){
+        companion object{
+                fun toInterestListEntity(user: User, signUpReq: SignUpReq): List<UserInterest> {
+                        return signUpReq.interestList.stream()
+                                .map { i ->
+                                        UserInterest(category = Category.getCategoryByValue(i.category),
+                                                user = user)
+                                }.collect(Collectors.toList())
+                }
+
+                fun toInterestEntity(user: User, category: Category): UserInterest {
+                        return UserInterest(user = user,
+                                category = category)
+                }
+        }
+}
diff --git a/src/main/kotlin/com/psr/psr/user/service/UserService.kt b/src/main/kotlin/com/psr/psr/user/service/UserService.kt
index 9a10ed8..6ecc5a7 100644
--- a/src/main/kotlin/com/psr/psr/user/service/UserService.kt
+++ b/src/main/kotlin/com/psr/psr/user/service/UserService.kt
@@ -21,21 +21,21 @@ import com.psr.psr.global.exception.BaseResponseCode.*
 import com.psr.psr.global.jwt.dto.TokenDto
 import com.psr.psr.global.jwt.utils.JwtUtils
 import com.psr.psr.user.dto.*
-import com.psr.psr.user.dto.assembler.UserAssembler
+import com.psr.psr.user.dto.eidReq.BusinessListReq
 import com.psr.psr.user.dto.eidReq.BusinessListRes
+import com.psr.psr.user.dto.phoneReq.SMSReq
 import com.psr.psr.user.dto.request.*
 import com.psr.psr.user.dto.response.EmailRes
 import com.psr.psr.user.dto.response.MyPageInfoRes
 import com.psr.psr.user.dto.response.PostNotiRes
 import com.psr.psr.user.dto.response.ProfileRes
-import com.psr.psr.user.entity.Category
-import com.psr.psr.user.entity.Type
-import com.psr.psr.user.entity.User
+import com.psr.psr.user.entity.*
 import com.psr.psr.user.repository.BusinessInfoRepository
 import com.psr.psr.user.repository.UserInterestRepository
 import com.psr.psr.user.repository.UserRepository
 import com.psr.psr.user.utils.SmsUtils
 import jakarta.servlet.http.HttpServletRequest
+import org.apache.commons.lang3.RandomStringUtils
 import org.apache.tomcat.util.codec.binary.Base64
 import org.springframework.beans.factory.annotation.Value
 import org.springframework.http.HttpHeaders
@@ -71,8 +71,6 @@ class UserService(
     private val serviceId: String,
     @Value("\${naver.cloud.sms.send-phone}")
     private val sendPhone: String,
-    private val userAssembler: UserAssembler
-
 ) {
     // 회원가입
     @Transactional
@@ -96,13 +94,13 @@ class UserService(
         val encodedPassword = passwordEncoder.encode(signUpReq.password)
         signUpReq.password = encodedPassword
         // user 저장
-        val user = userRepository.save(userAssembler.toEntity(signUpReq))
-        userInterestRepository.saveAll(userAssembler.toInterestListEntity(user, signUpReq))
+        val user = userRepository.save(User.toEntity(signUpReq))
+        userInterestRepository.saveAll(UserInterest.toInterestListEntity(user, signUpReq))
 
         // 사업자인경우
         if (user.type == Type.ENTREPRENEUR){
             if(signUpReq.entreInfo == null) throw BaseException(NOT_EMPTY_EID)
-            businessInfoRepository.save(userAssembler.toBusinessEntity(user, signUpReq))
+            businessInfoRepository.save(BusinessInfo.toBusinessEntity(user, signUpReq))
         }
 
         // token 생성
@@ -132,7 +130,7 @@ class UserService(
 
     // 사용자 프로필 불러오기
     fun getProfile(user: User): ProfileRes {
-        return userAssembler.toProfileRes(user)
+        return ProfileRes.toProfileRes(user)
     }
 
     // 사용자 프로필 변경
@@ -171,7 +169,7 @@ class UserService(
     // 공공데이터포털에서 사용자 불러오기
     private fun getEidInfo(userEidReq: UserEidReq): BusinessListRes {
         val url = EID_URL + serviceKey
-        val businesses = userAssembler.toUserEidList(userEidReq)
+        val businesses = BusinessListReq.toUserEidList(userEidReq)
         val json = ObjectMapper().writeValueAsString(businesses)
         val factory = DefaultUriBuilderFactory(url)
         factory.encodingMode = DefaultUriBuilderFactory.EncodingMode.VALUES_ONLY;
@@ -193,13 +191,13 @@ class UserService(
 
     // 마이페이지 정보 불러오기
     fun getMyPageInfo(user: User): MyPageInfoRes {
-        return userAssembler.toMyPageInfoRes(user)
+        return MyPageInfoRes.toMyPageInfoRes(user)
     }
 
     // 토큰 재발급
     fun reissueToken(tokenDto: TokenDto): TokenDto {
         // bearer String replace blank
-        userAssembler.toTokenDto(tokenDto)
+        TokenDto.toTokenDto(tokenDto)
         // refresh token 검증
         jwtUtils.validateToken(tokenDto.refreshToken)
         // accessToken 내 사용자 정보
@@ -251,7 +249,7 @@ class UserService(
             .forEach { interest ->
                 if(!categoryLists.contains(interest)) {
                     // 과거에 삭제했던 경우 / 새롭게 생성하는 경우
-                    val interestE = userInterestRepository.findByUserAndCategory(user, interest)?: userAssembler.toInterestEntity(user, interest)
+                    val interestE = userInterestRepository.findByUserAndCategory(user, interest)?: UserInterest.toInterestEntity(user, interest)
                     interestE.status = ACTIVE_STATUS
                     userInterestRepository.save(interestE)
                 }
@@ -267,7 +265,7 @@ class UserService(
 
     // 관심 목록 조회
     fun getWatchList(user: User) :UserInterestListDto {
-        return userAssembler.toUserInterestListDto(user.interests)
+        return UserInterestListDto.toUserInterestListDto(user.interests)
     }
 
     // 유효 휴대폰 검증
@@ -277,7 +275,7 @@ class UserService(
         val url = FIRST_URL + MIDDLE_URL + serviceId + FINAL_URL
         val factory = DefaultUriBuilderFactory(url)
         factory.encodingMode = DefaultUriBuilderFactory.EncodingMode.VALUES_ONLY
-        val smsKey = userAssembler.createSmsKey()
+        val smsKey = createSmsKey()
 
         WebClient.builder()
             .uriBuilderFactory(factory)
@@ -287,7 +285,7 @@ class UserService(
             .defaultHeader(ACCESS_KEY_HEADER, accessKey)
             .defaultHeader(SIGNATURE_HEADER, makeSignature(time))
             .build().post()
-            .bodyValue(this.userAssembler.toSMSReqDto(validPhoneReq, smsKey, sendPhone))
+            .bodyValue(SMSReq.toSMSReqDto(validPhoneReq, smsKey, sendPhone))
             .retrieve()
             .onStatus({ it.isError }) { response ->
                 throw BaseException(PHONE_ERROR)
@@ -309,7 +307,7 @@ class UserService(
         // 인증번호 확인
         checkValidSmsKey(findIdPwReq.phone, findIdPwReq.smsKey)
         val user: User = userRepository.findByNameAndPhoneAndStatus(findIdPwReq.name!!, findIdPwReq.phone, ACTIVE_STATUS) ?: throw BaseException(NOT_FOUND_USER)
-        return userAssembler.toEmailResDto(user)
+        return EmailRes.toEmailResDto(user)
     }
 
     // 비밀번호 변경을 위한 인증
@@ -346,4 +344,8 @@ class UserService(
         val rawHmac = mac.doFinal(message.toByteArray(charset(UTF_8)))
         return Base64.encodeBase64String(rawHmac)
     }
+
+    fun createSmsKey() : String{
+        return RandomStringUtils.random(5, false, true);
+    }
 }
\ No newline at end of file