diff --git a/service/src/main/kotlin/com/sangdol/roomescape/payment/mapper/PaymentClientDTOMappingExtensions.kt b/service/src/main/kotlin/com/sangdol/roomescape/payment/mapper/PaymentClientDTOMappingExtensions.kt
index cc2979a8..e5794fd0 100644
--- a/service/src/main/kotlin/com/sangdol/roomescape/payment/mapper/PaymentClientDTOMappingExtensions.kt
+++ b/service/src/main/kotlin/com/sangdol/roomescape/payment/mapper/PaymentClientDTOMappingExtensions.kt
@@ -1,5 +1,7 @@
 package com.sangdol.roomescape.payment.mapper
 
+import com.sangdol.roomescape.payment.business.domain.*
+import com.sangdol.roomescape.payment.business.event.PaymentEvent
 import com.sangdol.roomescape.payment.dto.CancelDetail
 import com.sangdol.roomescape.payment.dto.PaymentGatewayResponse
 import com.sangdol.roomescape.payment.exception.PaymentErrorCode
@@ -94,3 +96,88 @@ fun CancelDetail.toEntity(
     transferDiscountAmount = this.transferDiscountAmount,
     easypayDiscountAmount = this.easyPayDiscountAmount
 )
+
+fun PaymentGatewayResponse.toEvent(reservationId: Long): PaymentEvent {
+    return PaymentEvent(
+        reservationId = reservationId,
+        paymentKey = this.paymentKey,
+        orderId = this.orderId,
+        type = this.type,
+        status = this.status,
+        totalAmount = this.totalAmount,
+        vat = this.vat,
+        suppliedAmount = this.suppliedAmount,
+        method = this.method,
+        requestedAt = this.requestedAt.toInstant(),
+        approvedAt = this.approvedAt.toInstant(),
+        detail = this.toDetail()
+    )
+}
+
+fun PaymentGatewayResponse.toDetail(): PaymentDetail {
+    return when(this.method) {
+        PaymentMethod.TRANSFER -> this.toBankTransferDetail()
+        PaymentMethod.CARD -> this.toCardDetail()
+        PaymentMethod.EASY_PAY -> {
+            if (this.card != null) {
+                this.toEasypayCardDetail()
+            } else {
+                this.toEasypayPrepaidDetail()
+            }
+        }
+
+        else -> throw PaymentException(PaymentErrorCode.NOT_SUPPORTED_PAYMENT_TYPE)
+    }
+}
+
+private fun PaymentGatewayResponse.toBankTransferDetail(): BankTransferPaymentDetail {
+    val bankTransfer = this.transfer ?: throw PaymentException(PaymentErrorCode.PAYMENT_UNEXPECTED_ERROR)
+
+    return BankTransferPaymentDetail(
+        bankCode = bankTransfer.bankCode,
+        settlementStatus = bankTransfer.settlementStatus
+    )
+}
+
+private fun PaymentGatewayResponse.toCardDetail(): CardPaymentDetail {
+    val cardDetail = this.card ?: throw PaymentException(PaymentErrorCode.PAYMENT_UNEXPECTED_ERROR)
+
+    return CardPaymentDetail(
+        issuerCode = cardDetail.issuerCode,
+        number = cardDetail.number,
+        amount = cardDetail.amount,
+        cardType = cardDetail.cardType,
+        ownerType = cardDetail.ownerType,
+        isInterestFree = cardDetail.isInterestFree,
+        approveNo = cardDetail.approveNo,
+        installmentPlanMonths = cardDetail.installmentPlanMonths
+    )
+}
+
+private fun PaymentGatewayResponse.toEasypayCardDetail(): EasypayCardPaymentDetail {
+    val cardDetail = this.card ?: throw PaymentException(PaymentErrorCode.PAYMENT_UNEXPECTED_ERROR)
+    val easypay = this.easyPay ?: throw PaymentException(PaymentErrorCode.PAYMENT_UNEXPECTED_ERROR)
+
+    return EasypayCardPaymentDetail(
+        issuerCode = cardDetail.issuerCode,
+        number = cardDetail.number,
+        amount = cardDetail.amount,
+        cardType = cardDetail.cardType,
+        ownerType = cardDetail.ownerType,
+        isInterestFree = cardDetail.isInterestFree,
+        approveNo = cardDetail.approveNo,
+        installmentPlanMonths = cardDetail.installmentPlanMonths,
+        easypayProvider = easypay.provider,
+        easypayDiscountAmount = easypay.discountAmount
+    )
+}
+
+private fun PaymentGatewayResponse.toEasypayPrepaidDetail(): EasypayPrepaidPaymentDetail {
+    val easypay = this.easyPay ?: throw PaymentException(PaymentErrorCode.PAYMENT_UNEXPECTED_ERROR)
+
+    return EasypayPrepaidPaymentDetail(
+        provider = easypay.provider,
+        amount = easypay.amount,
+        discountAmount = easypay.discountAmount
+    )
+}
diff --git a/service/src/test/kotlin/com/sangdol/roomescape/payment/business/event/PaymentEventListenerTest.kt b/service/src/test/kotlin/com/sangdol/roomescape/payment/PaymentEventListenerTest.kt
similarity index 95%
rename from service/src/test/kotlin/com/sangdol/roomescape/payment/business/event/PaymentEventListenerTest.kt
rename to service/src/test/kotlin/com/sangdol/roomescape/payment/PaymentEventListenerTest.kt
index c8a987f9..1808ea2d 100644
--- a/service/src/test/kotlin/com/sangdol/roomescape/payment/business/event/PaymentEventListenerTest.kt
+++ b/service/src/test/kotlin/com/sangdol/roomescape/payment/PaymentEventListenerTest.kt
@@ -1,6 +1,7 @@
-package com.sangdol.roomescape.payment.business.event
+package com.sangdol.roomescape.payment
 
 import com.sangdol.roomescape.payment.business.domain.PaymentMethod
+import com.sangdol.roomescape.payment.business.event.PaymentEventListener
 import com.sangdol.roomescape.payment.infrastructure.persistence.PaymentCardDetailEntity
 import com.sangdol.roomescape.payment.infrastructure.persistence.PaymentDetailRepository
 import com.sangdol.roomescape.payment.infrastructure.persistence.PaymentRepository
@@ -50,4 +51,4 @@ class PaymentEventListenerTest(
             }
         }
     }
-}
+}
\ No newline at end of file