diff --git a/product-order-service/src/main/java/com/example/productorderservice/order/Order.java b/product-order-service/src/main/java/com/example/productorderservice/order/Order.java
index 829af2d3..610704b9 100644
--- a/product-order-service/src/main/java/com/example/productorderservice/order/Order.java
+++ b/product-order-service/src/main/java/com/example/productorderservice/order/Order.java
@@ -12,7 +12,7 @@ import javax.persistence.*;
 @Table(name = "orders")
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 @Getter
-class Order {
+public class Order {
 
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
@@ -29,4 +29,7 @@ class Order {
         this.quantity = quantity;
     }
 
+    public int getTotalPrice() {
+        return product.getDiscountedPrice() * quantity;
+    }
 }
diff --git a/product-order-service/src/main/java/com/example/productorderservice/product/DiscountPolicy.java b/product-order-service/src/main/java/com/example/productorderservice/product/DiscountPolicy.java
index 7f2e8f3f..beed732c 100644
--- a/product-order-service/src/main/java/com/example/productorderservice/product/DiscountPolicy.java
+++ b/product-order-service/src/main/java/com/example/productorderservice/product/DiscountPolicy.java
@@ -1,6 +1,19 @@
 package com.example.productorderservice.product;
 
 public enum DiscountPolicy {
-    NONE
+    NONE {
+        @Override
+        int applyDiscount(int price) {
+            return price;
+        }
+    },
+    FIX_1000_AMOUNT {
+        @Override
+        int applyDiscount(int price) {
+            return Math.max(price - 1000, 0);
+        }
+    }
 
+    ;
+    abstract int applyDiscount(int price);
 }
diff --git a/product-order-service/src/main/java/com/example/productorderservice/product/Product.java b/product-order-service/src/main/java/com/example/productorderservice/product/Product.java
index bd5a8a4f..65638b70 100644
--- a/product-order-service/src/main/java/com/example/productorderservice/product/Product.java
+++ b/product-order-service/src/main/java/com/example/productorderservice/product/Product.java
@@ -38,4 +38,8 @@ class Product {
         this.price = price;
         this.discountPolicy = discountPolicy;
     }
+
+    public int getDiscountedPrice() {
+        return discountPolicy.applyDiscount(price);
+    }
 }
diff --git a/product-order-service/src/test/java/com/example/productorderservice/order/OrderTest.java b/product-order-service/src/test/java/com/example/productorderservice/order/OrderTest.java
new file mode 100644
index 00000000..37620e99
--- /dev/null
+++ b/product-order-service/src/test/java/com/example/productorderservice/order/OrderTest.java
@@ -0,0 +1,19 @@
+package com.example.productorderservice.order;
+
+import com.example.productorderservice.product.DiscountPolicy;
+import com.example.productorderservice.product.Product;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class OrderTest {
+
+    @Test
+    void getTotalPrice() {
+        Order order = new Order(new Product("상품", 1000, DiscountPolicy.NONE), 2);
+
+        int totalPrice = order.getTotalPrice();
+
+        assertThat(totalPrice).isEqualTo(2000);
+    }
+}
\ No newline at end of file
diff --git a/product-order-service/src/test/java/com/example/productorderservice/payment/ConsolePaymentGateway.java b/product-order-service/src/test/java/com/example/productorderservice/payment/ConsolePaymentGateway.java
new file mode 100644
index 00000000..af1622f2
--- /dev/null
+++ b/product-order-service/src/test/java/com/example/productorderservice/payment/ConsolePaymentGateway.java
@@ -0,0 +1,9 @@
+package com.example.productorderservice.payment;
+
+public class ConsolePaymentGateway implements PaymentGateway {
+    @Override
+    public void execute(int totalPrice, String cardNumber) {
+        System.out.println("결제 완료");
+
+    }
+}
diff --git a/product-order-service/src/test/java/com/example/productorderservice/payment/Payment.java b/product-order-service/src/test/java/com/example/productorderservice/payment/Payment.java
new file mode 100644
index 00000000..c65c1c80
--- /dev/null
+++ b/product-order-service/src/test/java/com/example/productorderservice/payment/Payment.java
@@ -0,0 +1,34 @@
+package com.example.productorderservice.payment;
+
+import com.example.productorderservice.order.Order;
+import org.springframework.util.Assert;
+
+class Payment {
+
+    private Long id;
+    private final Order order;
+    private final String cardNumber;
+
+    public Payment(Order order, String cardNumber) {
+        Assert.notNull(order, "주문은 필수입니다.");
+        Assert.hasText(cardNumber, "카드번호는 필수입니다.");
+        this.order = order;
+        this.cardNumber = cardNumber;
+    }
+
+    public void assign(Long id) {
+        this.id = id;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public int getPrice() {
+        return order.getTotalPrice();
+    }
+
+    public String getCardNumber() {
+        return cardNumber;
+    }
+}
diff --git a/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentAdapter.java b/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentAdapter.java
new file mode 100644
index 00000000..77601eab
--- /dev/null
+++ b/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentAdapter.java
@@ -0,0 +1,30 @@
+package com.example.productorderservice.payment;
+
+import com.example.productorderservice.order.Order;
+import com.example.productorderservice.product.DiscountPolicy;
+import com.example.productorderservice.product.Product;
+
+class PaymentAdapter implements PaymentPort {
+    private final PaymentGateway paymentGateway;
+    private final PaymentRepository paymentRepository;
+
+    PaymentAdapter(PaymentGateway paymentGateway, PaymentRepository paymentRepository) {
+        this.paymentGateway = paymentGateway;
+        this.paymentRepository = paymentRepository;
+    }
+
+    @Override
+    public Order getOrder(Long orderId) {
+        return new Order(new Product("상품1", 1000, DiscountPolicy.NONE), 2);
+    }
+
+    @Override
+    public void pay(int totalPrice, String cardNumber) {
+        paymentGateway.execute(totalPrice, cardNumber);
+    }
+
+    @Override
+    public void save(Payment payment) {
+        paymentRepository.save(payment);
+    }
+}
diff --git a/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentGateway.java b/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentGateway.java
new file mode 100644
index 00000000..2255bc44
--- /dev/null
+++ b/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentGateway.java
@@ -0,0 +1,5 @@
+package com.example.productorderservice.payment;
+
+interface PaymentGateway {
+    void execute(int totalPrice, String cardNumber);
+}
diff --git a/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentPort.java b/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentPort.java
new file mode 100644
index 00000000..ae489ccb
--- /dev/null
+++ b/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentPort.java
@@ -0,0 +1,11 @@
+package com.example.productorderservice.payment;
+
+import com.example.productorderservice.order.Order;
+
+interface PaymentPort {
+    Order getOrder(Long orderId);
+
+    void pay(int totalPrice, String cardNumber);
+
+    void save(Payment payment);
+}
diff --git a/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentRepository.java b/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentRepository.java
new file mode 100644
index 00000000..ae64d6be
--- /dev/null
+++ b/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentRepository.java
@@ -0,0 +1,14 @@
+package com.example.productorderservice.payment;
+
+import java.util.HashMap;
+import java.util.Map;
+
+class PaymentRepository {
+    private final Map<Long, Payment> persistence = new HashMap<>();
+    private Long sequence = 0L;
+
+    public void save(Payment payment) {
+        payment.assign(++sequence);
+        persistence.put(payment.getId(), payment);
+    }
+}
diff --git a/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentRequest.java b/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentRequest.java
new file mode 100644
index 00000000..f78f8130
--- /dev/null
+++ b/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentRequest.java
@@ -0,0 +1,11 @@
+package com.example.productorderservice.payment;
+
+import org.springframework.util.Assert;
+
+record PaymentRequest(Long orderId, String cardNumber) {
+
+    PaymentRequest {
+        Assert.notNull(orderId, "주문 ID는 필수입니다.");
+        Assert.hasText(cardNumber, "카드번호는 필수입니다.");
+    }
+}
diff --git a/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentService.java b/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentService.java
new file mode 100644
index 00000000..f09a037b
--- /dev/null
+++ b/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentService.java
@@ -0,0 +1,20 @@
+package com.example.productorderservice.payment;
+
+import com.example.productorderservice.order.Order;
+
+class PaymentService {
+    private final PaymentPort paymentPort;
+
+    PaymentService(PaymentPort paymentPort) {
+        this.paymentPort = paymentPort;
+    }
+
+    public void payment(PaymentRequest request) {
+        final Order order = paymentPort.getOrder(request.orderId());
+
+        final Payment payment = new Payment(order, request.cardNumber());
+
+        paymentPort.pay(payment.getPrice(), payment.getCardNumber());
+        paymentPort.save(payment);
+    }
+}
diff --git a/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentServiceTest.java b/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentServiceTest.java
new file mode 100644
index 00000000..5cdb9fcb
--- /dev/null
+++ b/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentServiceTest.java
@@ -0,0 +1,27 @@
+package com.example.productorderservice.payment;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+class PaymentServiceTest {
+
+    private PaymentService paymentService;
+    private PaymentPort paymentPort;
+
+    @BeforeEach
+    void setUp() {
+        final PaymentGateway paymentGateway = new ConsolePaymentGateway();
+        final PaymentRepository paymentRepository= new PaymentRepository();
+        paymentPort = new PaymentAdapter(paymentGateway, paymentRepository);
+        paymentService = new PaymentService(paymentPort);
+    }
+
+    @Test
+    void 상품주문() {
+
+        final PaymentRequest request = PaymentSteps.주문결제요청_생성();
+
+        paymentService.payment(request);
+    }
+
+}
diff --git a/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentSteps.java b/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentSteps.java
new file mode 100644
index 00000000..48f1235f
--- /dev/null
+++ b/product-order-service/src/test/java/com/example/productorderservice/payment/PaymentSteps.java
@@ -0,0 +1,10 @@
+package com.example.productorderservice.payment;
+
+public class PaymentSteps {
+
+    public static PaymentRequest 주문결제요청_생성() {
+        final Long orderId = 1L;
+        final String cardNumber = "1234-1234-1234-1234";
+        return new PaymentRequest(orderId, cardNumber);
+    }
+}
diff --git a/product-order-service/src/test/java/com/example/productorderservice/product/DiscountPolicyTest.java b/product-order-service/src/test/java/com/example/productorderservice/product/DiscountPolicyTest.java
new file mode 100644
index 00000000..43d193d6
--- /dev/null
+++ b/product-order-service/src/test/java/com/example/productorderservice/product/DiscountPolicyTest.java
@@ -0,0 +1,33 @@
+package com.example.productorderservice.product;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class DiscountPolicyTest {
+
+    @Test
+    void applyDiscount_NONE() {
+        final int price = 1000;
+        final int discountedPrice = DiscountPolicy.NONE.applyDiscount(price);
+
+        assertThat(discountedPrice).isEqualTo(price);
+    }
+
+    @Test
+    void applyDiscount_FIX_1000_AMOUNT() {
+        final int price = 2000;
+        final int discountedPrice = DiscountPolicy.FIX_1000_AMOUNT.applyDiscount(price);
+
+        assertThat(discountedPrice).isEqualTo(1000);
+    }
+
+    @Test
+    void applyDiscount_FIX_1000_AMOUNT_over() {
+        final int price = 500;
+        final int discountedPrice = DiscountPolicy.FIX_1000_AMOUNT.applyDiscount(price);
+
+        assertThat(discountedPrice).isEqualTo(0);
+    }
+
+}
\ No newline at end of file
diff --git a/product-order-service/src/test/java/com/example/productorderservice/product/ProductTest.java b/product-order-service/src/test/java/com/example/productorderservice/product/ProductTest.java
index fc62600e..cbeb7d82 100644
--- a/product-order-service/src/test/java/com/example/productorderservice/product/ProductTest.java
+++ b/product-order-service/src/test/java/com/example/productorderservice/product/ProductTest.java
@@ -16,4 +16,22 @@ class ProductTest {
         assertThat(product.getPrice()).isEqualTo(2000);
     }
 
+    @Test
+    void none_discounted_product() {
+        Product product = new Product("상품명", 1000, DiscountPolicy.NONE);
+
+        int discountedPrice = product.getDiscountedPrice();
+
+        assertThat(discountedPrice).isEqualTo(1000);
+    }
+
+    @Test
+    void fix_1000_discounted_product() {
+        Product product = new Product("상품명", 2000, DiscountPolicy.FIX_1000_AMOUNT);
+
+        int discountedPrice = product.getDiscountedPrice();
+
+        assertThat(discountedPrice).isEqualTo(1000);
+    }
+
 }
\ No newline at end of file