diff --git a/src/statepattern/Client.java b/src/behavior/statepattern/Client.java
similarity index 90%
rename from src/statepattern/Client.java
rename to src/behavior/statepattern/Client.java
index 0c9344c..7a4fb0c 100644
--- a/src/statepattern/Client.java
+++ b/src/behavior/statepattern/Client.java
@@ -1,4 +1,4 @@
-package statepattern;
+package behavior.statepattern;
 
 public class Client {
     public static void main(String[] args) {
diff --git a/src/statepattern/LaptopContext.java b/src/behavior/statepattern/LaptopContext.java
similarity index 75%
rename from src/statepattern/LaptopContext.java
rename to src/behavior/statepattern/LaptopContext.java
index 33d87fd..40c2d99 100644
--- a/src/statepattern/LaptopContext.java
+++ b/src/behavior/statepattern/LaptopContext.java
@@ -1,8 +1,8 @@
-package statepattern;
+package behavior.statepattern;
 
-import statepattern.state.OffState;
-import statepattern.state.PowerState;
-import statepattern.state.SavingState;
+import behavior.statepattern.state.OffState;
+import behavior.statepattern.state.PowerState;
+import behavior.statepattern.state.SavingState;
 
 public class LaptopContext {
     private PowerState powerState;
diff --git a/src/statepattern/state/OffState.java b/src/behavior/statepattern/state/OffState.java
similarity index 82%
rename from src/statepattern/state/OffState.java
rename to src/behavior/statepattern/state/OffState.java
index 31be078..508220b 100644
--- a/src/statepattern/state/OffState.java
+++ b/src/behavior/statepattern/state/OffState.java
@@ -1,6 +1,6 @@
-package statepattern.state;
+package behavior.statepattern.state;
 
-import statepattern.LaptopContext;
+import behavior.statepattern.LaptopContext;
 
 public class OffState implements PowerState{
 
diff --git a/src/statepattern/state/OnState.java b/src/behavior/statepattern/state/OnState.java
similarity index 82%
rename from src/statepattern/state/OnState.java
rename to src/behavior/statepattern/state/OnState.java
index dcc66a0..331af5a 100644
--- a/src/statepattern/state/OnState.java
+++ b/src/behavior/statepattern/state/OnState.java
@@ -1,6 +1,6 @@
-package statepattern.state;
+package behavior.statepattern.state;
 
-import statepattern.LaptopContext;
+import behavior.statepattern.LaptopContext;
 
 public class OnState implements PowerState{
 
diff --git a/src/behavior/statepattern/state/PowerState.java b/src/behavior/statepattern/state/PowerState.java
new file mode 100644
index 0000000..7394b37
--- /dev/null
+++ b/src/behavior/statepattern/state/PowerState.java
@@ -0,0 +1,7 @@
+package behavior.statepattern.state;
+
+import behavior.statepattern.LaptopContext;
+
+public interface PowerState {
+    void pushPowerButton(LaptopContext context);
+}
diff --git a/src/statepattern/state/SavingState.java b/src/behavior/statepattern/state/SavingState.java
similarity index 83%
rename from src/statepattern/state/SavingState.java
rename to src/behavior/statepattern/state/SavingState.java
index e5316b6..b9bfc55 100644
--- a/src/statepattern/state/SavingState.java
+++ b/src/behavior/statepattern/state/SavingState.java
@@ -1,6 +1,6 @@
-package statepattern.state;
+package behavior.statepattern.state;
 
-import statepattern.LaptopContext;
+import behavior.statepattern.LaptopContext;
 
 public class SavingState implements PowerState{
 
diff --git a/src/behavior/strategypattern/Client.java b/src/behavior/strategypattern/Client.java
new file mode 100644
index 0000000..de8b05c
--- /dev/null
+++ b/src/behavior/strategypattern/Client.java
@@ -0,0 +1,20 @@
+package behavior.strategypattern;
+
+import behavior.strategypattern.context.Item;
+import behavior.strategypattern.context.ShoppingCart;
+import behavior.strategypattern.strategy.MasterCardStrategy;
+import behavior.strategypattern.strategy.MobilePayStrategy;
+
+public class Client {
+    public static void main(String[] args) {
+        ShoppingCart cart = new ShoppingCart();
+        cart.addItem(new Item("Macbook Pro", 10000));
+        cart.addItem(new Item("IPhone", 2000));
+
+        cart.setPaymentStrategy(new MasterCardStrategy("Dmori", "1234-1234-1234-1234", "123"));
+        cart.pay();
+
+        cart.setPaymentStrategy(new MobilePayStrategy("example@naver.com", "12345"));
+        cart.pay();
+    }
+}
diff --git a/src/behavior/strategypattern/context/Item.java b/src/behavior/strategypattern/context/Item.java
new file mode 100644
index 0000000..b53e276
--- /dev/null
+++ b/src/behavior/strategypattern/context/Item.java
@@ -0,0 +1,16 @@
+package behavior.strategypattern.context;
+
+public class Item {
+
+    private String name;
+    private int price;
+
+    public Item(String name, int price) {
+        this.name = name;
+        this.price = price;
+    }
+
+    public int getPrice() {
+        return price;
+    }
+}
diff --git a/src/behavior/strategypattern/context/ShoppingCart.java b/src/behavior/strategypattern/context/ShoppingCart.java
new file mode 100644
index 0000000..691a606
--- /dev/null
+++ b/src/behavior/strategypattern/context/ShoppingCart.java
@@ -0,0 +1,32 @@
+package behavior.strategypattern.context;
+
+import behavior.strategypattern.strategy.PaymentStrategy;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ShoppingCart {
+
+    private List<Item> items;
+    private PaymentStrategy paymentStrategy;
+
+    public ShoppingCart() {
+        this.items = new ArrayList<>();
+    }
+
+    public void addItem(Item item) {
+        this.items.add(item);
+    }
+
+    public void setPaymentStrategy(PaymentStrategy paymentStrategy) {
+        this.paymentStrategy = paymentStrategy;
+    }
+
+    public void pay(){
+        int amount = 0;
+        for (Item item : items) {
+            amount += item.getPrice();
+        }
+        this.paymentStrategy.pay(amount);
+    }
+}
diff --git a/src/behavior/strategypattern/strategy/MasterCardStrategy.java b/src/behavior/strategypattern/strategy/MasterCardStrategy.java
new file mode 100644
index 0000000..01efee7
--- /dev/null
+++ b/src/behavior/strategypattern/strategy/MasterCardStrategy.java
@@ -0,0 +1,19 @@
+package behavior.strategypattern.strategy;
+
+public class MasterCardStrategy implements PaymentStrategy {
+
+    private String name;
+    private String cardNumber;
+    private String cvv;
+
+    public MasterCardStrategy(String name, String cardNumber, String cvv) {
+        this.name = name;
+        this.cardNumber = cardNumber;
+        this.cvv = cvv;
+    }
+
+    @Override
+    public void pay(int amount) {
+        System.out.println(amount + " Won paid using Master Card");
+    }
+}
diff --git a/src/behavior/strategypattern/strategy/MobilePayStrategy.java b/src/behavior/strategypattern/strategy/MobilePayStrategy.java
new file mode 100644
index 0000000..4ea59f6
--- /dev/null
+++ b/src/behavior/strategypattern/strategy/MobilePayStrategy.java
@@ -0,0 +1,17 @@
+package behavior.strategypattern.strategy;
+
+public class MobilePayStrategy implements PaymentStrategy {
+
+    private String email;
+    private String password;
+
+    public MobilePayStrategy(String email, String password) {
+        this.email = email;
+        this.password = password;
+    }
+
+    @Override
+    public void pay(int amount) {
+        System.out.println(amount + " Won paid using Mobile Pay");
+    }
+}
diff --git a/src/behavior/strategypattern/strategy/PaymentStrategy.java b/src/behavior/strategypattern/strategy/PaymentStrategy.java
new file mode 100644
index 0000000..e87995a
--- /dev/null
+++ b/src/behavior/strategypattern/strategy/PaymentStrategy.java
@@ -0,0 +1,5 @@
+package behavior.strategypattern.strategy;
+
+public interface PaymentStrategy {
+    void pay(int amount);
+}
diff --git a/src/statepattern/state/PowerState.java b/src/statepattern/state/PowerState.java
deleted file mode 100644
index 63ce698..0000000
--- a/src/statepattern/state/PowerState.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package statepattern.state;
-
-import statepattern.LaptopContext;
-
-public interface PowerState {
-    void pushPowerButton(LaptopContext context);
-}