diff --git a/src/main/kotlin/andreas311/miso/common/entitiy/BaseIdxEntity.kt b/src/main/kotlin/andreas311/miso/common/entitiy/BaseIdxEntity.kt
deleted file mode 100644
index 81253e17..00000000
--- a/src/main/kotlin/andreas311/miso/common/entitiy/BaseIdxEntity.kt
+++ /dev/null
@@ -1,13 +0,0 @@
-package andreas311.miso.common.entitiy
-
-import javax.persistence.GeneratedValue
-import javax.persistence.GenerationType
-import javax.persistence.Id
-import javax.persistence.MappedSuperclass
-
-@MappedSuperclass
-abstract class BaseIdxEntity(
-    @Id
-    @GeneratedValue(strategy = GenerationType.IDENTITY)
-    val idx: Long
-)
\ No newline at end of file
diff --git a/src/main/kotlin/andreas311/miso/domain/auth/application/service/SignUpService.kt b/src/main/kotlin/andreas311/miso/domain/auth/application/service/SignUpService.kt
index 82ddd154..c6dd81f5 100644
--- a/src/main/kotlin/andreas311/miso/domain/auth/application/service/SignUpService.kt
+++ b/src/main/kotlin/andreas311/miso/domain/auth/application/service/SignUpService.kt
@@ -24,7 +24,6 @@ class SignUpService(
     private val passwordEncodePort: PasswordEncodePort
 ) : SignUpUseCase {
     override fun execute(signUpDto: SignUpDto) {
-
         passwordEncodePort.isPasswordMatch(signUpDto.password, signUpDto.passwordCheck)
 
         if (!queryUserPort.existsByEmail(signUpDto.email)) {
diff --git a/src/main/kotlin/andreas311/miso/domain/email/adapter/input/EmailAdapter.kt b/src/main/kotlin/andreas311/miso/domain/email/adapter/input/EmailAdapter.kt
new file mode 100644
index 00000000..f12ce76b
--- /dev/null
+++ b/src/main/kotlin/andreas311/miso/domain/email/adapter/input/EmailAdapter.kt
@@ -0,0 +1,22 @@
+package andreas311.miso.domain.email.adapter.input
+
+import andreas311.miso.common.annotation.RequestController
+import andreas311.miso.domain.email.adapter.input.data.request.RandomKeyRequest
+import andreas311.miso.domain.email.adapter.input.mapper.EmailDataMapper
+import andreas311.miso.domain.email.application.port.input.RandomKeyConfirmUseCase
+import org.springframework.http.HttpStatus
+import org.springframework.http.ResponseEntity
+import org.springframework.web.bind.annotation.PostMapping
+import org.springframework.web.bind.annotation.RequestBody
+import javax.validation.Valid
+
+@RequestController("/email")
+class EmailAdapter(
+    private val emailDataMapper: EmailDataMapper,
+    private val randomKeyConfirmUseCase: RandomKeyConfirmUseCase
+) {
+    @PostMapping
+    fun emailCheck(@RequestBody @Valid randomKeyRequest: RandomKeyRequest): ResponseEntity<Void> =
+        randomKeyConfirmUseCase.execute(emailDataMapper toDto randomKeyRequest)
+            .let { ResponseEntity.status(HttpStatus.OK).build() }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/andreas311/miso/domain/email/adapter/input/data/request/RandomKeyRequest.kt b/src/main/kotlin/andreas311/miso/domain/email/adapter/input/data/request/RandomKeyRequest.kt
new file mode 100644
index 00000000..6ac21a99
--- /dev/null
+++ b/src/main/kotlin/andreas311/miso/domain/email/adapter/input/data/request/RandomKeyRequest.kt
@@ -0,0 +1,8 @@
+package andreas311.miso.domain.email.adapter.input.data.request
+
+import javax.validation.constraints.NotNull
+
+data class RandomKeyRequest(
+    @field:NotNull
+    val randomKey: String
+)
diff --git a/src/main/kotlin/andreas311/miso/domain/email/adapter/input/mapper/EmailDataMapper.kt b/src/main/kotlin/andreas311/miso/domain/email/adapter/input/mapper/EmailDataMapper.kt
new file mode 100644
index 00000000..3fc9ce60
--- /dev/null
+++ b/src/main/kotlin/andreas311/miso/domain/email/adapter/input/mapper/EmailDataMapper.kt
@@ -0,0 +1,13 @@
+package andreas311.miso.domain.email.adapter.input.mapper
+
+import andreas311.miso.domain.email.adapter.input.data.request.RandomKeyRequest
+import andreas311.miso.domain.email.application.port.input.dto.RandomKeyDto
+import org.springframework.stereotype.Component
+
+@Component
+class EmailDataMapper {
+    infix fun toDto(randomKeyRequest: RandomKeyRequest): RandomKeyDto =
+        RandomKeyDto(
+            randomKey = randomKeyRequest.randomKey
+        )
+}
\ No newline at end of file
diff --git a/src/main/kotlin/andreas311/miso/domain/email/adapter/output/persistence/QueryEmailPersistenceAdapter.kt b/src/main/kotlin/andreas311/miso/domain/email/adapter/output/persistence/QueryEmailPersistenceAdapter.kt
index 8e29cf7e..12b1fadf 100644
--- a/src/main/kotlin/andreas311/miso/domain/email/adapter/output/persistence/QueryEmailPersistenceAdapter.kt
+++ b/src/main/kotlin/andreas311/miso/domain/email/adapter/output/persistence/QueryEmailPersistenceAdapter.kt
@@ -18,4 +18,9 @@ class QueryEmailPersistenceAdapter(
 
     override fun existsByEmail(email: String): Boolean =
         emailRepository.existsByEmail(email)
+
+    override fun findByRandomKeyOrNull(randomKey: String): Email? {
+        val emailEntity = emailRepository.findByRandomKey(randomKey)
+        return emailMapper.toDomain(emailEntity)
+    }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/andreas311/miso/domain/email/adapter/output/persistence/entity/EmailEntity.kt b/src/main/kotlin/andreas311/miso/domain/email/adapter/output/persistence/entity/EmailEntity.kt
index 63dbbb28..56d3e3c3 100644
--- a/src/main/kotlin/andreas311/miso/domain/email/adapter/output/persistence/entity/EmailEntity.kt
+++ b/src/main/kotlin/andreas311/miso/domain/email/adapter/output/persistence/entity/EmailEntity.kt
@@ -1,11 +1,12 @@
 package andreas311.miso.domain.email.adapter.output.persistence.entity
 
-import andreas311.miso.common.entitiy.BaseIdxEntity
 import javax.persistence.*
 
 @Entity
 @Table(name = "email")
 class EmailEntity(
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "email_id", nullable = false)
     val id: Long,
 
@@ -17,4 +18,4 @@ class EmailEntity(
 
     @Column(name = "authentication", nullable = false)
     var authentication: Boolean
-): BaseIdxEntity(id)
\ No newline at end of file
+)
\ No newline at end of file
diff --git a/src/main/kotlin/andreas311/miso/domain/email/adapter/output/persistence/mapper/EmailMapper.kt b/src/main/kotlin/andreas311/miso/domain/email/adapter/output/persistence/mapper/EmailMapper.kt
index b3552fb2..5181bc85 100644
--- a/src/main/kotlin/andreas311/miso/domain/email/adapter/output/persistence/mapper/EmailMapper.kt
+++ b/src/main/kotlin/andreas311/miso/domain/email/adapter/output/persistence/mapper/EmailMapper.kt
@@ -14,7 +14,7 @@ class EmailMapper {
             authentication = domain.authentication
         )
 
-    fun toDomain(entity: EmailEntity): Email? =
+    fun toDomain(entity: EmailEntity?): Email? =
         entity?.let {
             Email(
                 id = entity.id,
diff --git a/src/main/kotlin/andreas311/miso/domain/email/adapter/output/persistence/repository/EmailRepository.kt b/src/main/kotlin/andreas311/miso/domain/email/adapter/output/persistence/repository/EmailRepository.kt
index 50fbd16b..4b8c6050 100644
--- a/src/main/kotlin/andreas311/miso/domain/email/adapter/output/persistence/repository/EmailRepository.kt
+++ b/src/main/kotlin/andreas311/miso/domain/email/adapter/output/persistence/repository/EmailRepository.kt
@@ -6,4 +6,5 @@ import org.springframework.data.repository.CrudRepository
 interface EmailRepository: CrudRepository<EmailEntity, Long> {
     fun findByEmail(email: String): EmailEntity
     fun existsByEmail(email: String): Boolean
+    fun findByRandomKey(randomKey: String): EmailEntity?
 }
\ No newline at end of file
diff --git a/src/main/kotlin/andreas311/miso/domain/email/application/exception/EmailKeyInvalidException.kt b/src/main/kotlin/andreas311/miso/domain/email/application/exception/EmailKeyInvalidException.kt
new file mode 100644
index 00000000..013863a2
--- /dev/null
+++ b/src/main/kotlin/andreas311/miso/domain/email/application/exception/EmailKeyInvalidException.kt
@@ -0,0 +1,6 @@
+package andreas311.miso.domain.email.application.exception
+
+import andreas311.miso.global.error.ErrorCode
+import andreas311.miso.global.error.exception.MisoException
+
+class EmailKeyInvalidException : MisoException(ErrorCode.EMAIL_KEY_IS_INVALID)
\ No newline at end of file
diff --git a/src/main/kotlin/andreas311/miso/domain/email/application/port/input/RandomKeyConfirmUseCase.kt b/src/main/kotlin/andreas311/miso/domain/email/application/port/input/RandomKeyConfirmUseCase.kt
new file mode 100644
index 00000000..b6059fc0
--- /dev/null
+++ b/src/main/kotlin/andreas311/miso/domain/email/application/port/input/RandomKeyConfirmUseCase.kt
@@ -0,0 +1,7 @@
+package andreas311.miso.domain.email.application.port.input
+
+import andreas311.miso.domain.email.application.port.input.dto.RandomKeyDto
+
+interface RandomKeyConfirmUseCase {
+    fun execute(randomKeyDto: RandomKeyDto)
+}
\ No newline at end of file
diff --git a/src/main/kotlin/andreas311/miso/domain/email/application/port/input/dto/RandomKeyDto.kt b/src/main/kotlin/andreas311/miso/domain/email/application/port/input/dto/RandomKeyDto.kt
new file mode 100644
index 00000000..7a711d49
--- /dev/null
+++ b/src/main/kotlin/andreas311/miso/domain/email/application/port/input/dto/RandomKeyDto.kt
@@ -0,0 +1,5 @@
+package andreas311.miso.domain.email.application.port.input.dto
+
+data class RandomKeyDto(
+    val randomKey: String
+)
diff --git a/src/main/kotlin/andreas311/miso/domain/email/application/port/output/QueryEmailPort.kt b/src/main/kotlin/andreas311/miso/domain/email/application/port/output/QueryEmailPort.kt
index e6d488c6..595c0406 100644
--- a/src/main/kotlin/andreas311/miso/domain/email/application/port/output/QueryEmailPort.kt
+++ b/src/main/kotlin/andreas311/miso/domain/email/application/port/output/QueryEmailPort.kt
@@ -5,4 +5,5 @@ import andreas311.miso.domain.email.domain.Email
 interface QueryEmailPort {
     fun findByEmailOrNull(email: String): Email?
     fun existsByEmail(email: String): Boolean
+    fun findByRandomKeyOrNull(randomKey: String): Email?
 }
\ No newline at end of file
diff --git a/src/main/kotlin/andreas311/miso/domain/email/application/service/RandomKeyConfirmService.kt b/src/main/kotlin/andreas311/miso/domain/email/application/service/RandomKeyConfirmService.kt
new file mode 100644
index 00000000..1b46885a
--- /dev/null
+++ b/src/main/kotlin/andreas311/miso/domain/email/application/service/RandomKeyConfirmService.kt
@@ -0,0 +1,21 @@
+package andreas311.miso.domain.email.application.service
+
+import andreas311.miso.common.annotation.RollbackService
+import andreas311.miso.domain.email.application.exception.EmailKeyInvalidException
+import andreas311.miso.domain.email.application.port.input.RandomKeyConfirmUseCase
+import andreas311.miso.domain.email.application.port.input.dto.RandomKeyDto
+import andreas311.miso.domain.email.application.port.output.CommandEmailPort
+import andreas311.miso.domain.email.application.port.output.QueryEmailPort
+
+@RollbackService
+class RandomKeyConfirmService(
+    private val commandEmailPort: CommandEmailPort,
+    private val queryEmailPort: QueryEmailPort
+): RandomKeyConfirmUseCase {
+    override fun execute(randomKeyDto: RandomKeyDto) {
+            val email = queryEmailPort.findByRandomKeyOrNull(randomKeyDto.randomKey)
+                ?: throw EmailKeyInvalidException()
+
+            commandEmailPort.saveEmail(email.updateAuthentication(true))
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/andreas311/miso/domain/email/domain/Email.kt b/src/main/kotlin/andreas311/miso/domain/email/domain/Email.kt
index 98b8d312..c3314c6f 100644
--- a/src/main/kotlin/andreas311/miso/domain/email/domain/Email.kt
+++ b/src/main/kotlin/andreas311/miso/domain/email/domain/Email.kt
@@ -6,7 +6,8 @@ data class Email(
     var randomKey: String,
     var authentication: Boolean
 ) {
-    fun updateAuthentication(authentication: Boolean) {
+    fun updateAuthentication(authentication: Boolean): Email {
         this.authentication = authentication
+        return this
     }
 }