diff --git a/놀이터(예제 코드 작성)/solid-design-pattern-sample/README.md b/놀이터(예제 코드 작성)/solid-design-pattern-sample/README.md
index a6d9f66..2037f4e 100644
--- a/놀이터(예제 코드 작성)/solid-design-pattern-sample/README.md	
+++ b/놀이터(예제 코드 작성)/solid-design-pattern-sample/README.md	
@@ -98,11 +98,21 @@
 #### 구현 요구사항
 
 - 지갑의 주인은 지갑에 대해 입금 또는 출금을 진행할 수 있다.
-- 지갑의 동작은 입금 및 출금만 가능하도록 제한된다. 
+- 지갑의 동작은 입금 및 출금만 가능하도록 제한된다.
 - 지갑에 대해 입금 또는 출금이 이루어질 때 메시지를 출력한다.
 
 ### 어댑터(Adapter) 패턴
 
+#### 구현 요구사항
+
+- 발전소는 정해진 요청 규격에 따라 전기를 생산한다.
+- 가정은 정해진 규격에 따라 전기를 얻는다.
+- 발전소와 가정에서 사용하는 전기는 각각 다르다.
+- 발전소에서 생산한 전기를 가정용으로 변환하는 계산식은 아래와 같다.
+    - 생산된 전류량 * (발전소 전압 / 가정용 전압)
+    - 발전소에서 생산한 전기의 전압은 11000V 이다.
+    - 가정에서 사용하는 전기의 전압은 220V 이다.
+
 ### 옵저버(Observer) 패턴
 
 ### 미디에이터(Mediator) 패턴
diff --git a/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/after/ElectricService.kt b/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/after/ElectricService.kt
new file mode 100644
index 0000000..101915e
--- /dev/null
+++ b/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/after/ElectricService.kt	
@@ -0,0 +1,7 @@
+package com.banjjoknim.soliddesignpatternsample.designpattern.adapter.after
+
+import com.banjjoknim.soliddesignpatternsample.designpattern.adapter.common.HomeElectric
+
+interface ElectricService {
+    fun generateElectric(current: Int): HomeElectric
+}
diff --git a/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/after/HomePowerStationElectricAdapter.kt b/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/after/HomePowerStationElectricAdapter.kt
new file mode 100644
index 0000000..5d0d7be
--- /dev/null
+++ b/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/after/HomePowerStationElectricAdapter.kt	
@@ -0,0 +1,15 @@
+package com.banjjoknim.soliddesignpatternsample.designpattern.adapter.after
+
+import com.banjjoknim.soliddesignpatternsample.designpattern.adapter.common.HomeElectric
+import com.banjjoknim.soliddesignpatternsample.designpattern.adapter.common.PowerStation
+import com.banjjoknim.soliddesignpatternsample.designpattern.adapter.common.PowerStationElectricRequest
+
+class HomePowerStationElectricAdapter(
+    private val powerStation: PowerStation
+): ElectricService {
+    override fun generateElectric(current: Int): HomeElectric {
+        val powerStationElectricRequest = PowerStationElectricRequest(current)
+        val powerStationElectric = powerStation.generateElectric(powerStationElectricRequest)
+        return powerStationElectric.toHomeElectric()
+    }
+}
diff --git a/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/after/PowerStationApplication.kt b/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/after/PowerStationApplication.kt
new file mode 100644
index 0000000..3deeb2a
--- /dev/null
+++ b/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/after/PowerStationApplication.kt	
@@ -0,0 +1,16 @@
+package com.banjjoknim.soliddesignpatternsample.designpattern.adapter.after
+
+import com.banjjoknim.soliddesignpatternsample.designpattern.adapter.common.Home
+import com.banjjoknim.soliddesignpatternsample.designpattern.adapter.common.PowerStation
+
+class PowerStationApplication
+
+fun main() {
+    val powerStation = PowerStation()
+    val homePowerStationElectricAdapter = HomePowerStationElectricAdapter(powerStation)
+
+    val homeElectric = homePowerStationElectricAdapter.generateElectric(1000)
+
+    val home = Home()
+    home.takeElectric(homeElectric) // 가정은 발전소의 전기를 사용하는 클라이언트 역할을 한다.
+}
diff --git a/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/before/PowerStationApplication.kt b/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/before/PowerStationApplication.kt
new file mode 100644
index 0000000..d4ff732
--- /dev/null
+++ b/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/before/PowerStationApplication.kt	
@@ -0,0 +1,19 @@
+package com.banjjoknim.soliddesignpatternsample.designpattern.adapter.before
+
+import com.banjjoknim.soliddesignpatternsample.designpattern.adapter.common.Home
+import com.banjjoknim.soliddesignpatternsample.designpattern.adapter.common.PowerStation
+import com.banjjoknim.soliddesignpatternsample.designpattern.adapter.common.PowerStationElectricRequest
+
+class PowerStationApplication
+
+fun main() {
+    val powerStation = PowerStation()
+
+    val electricRequest = PowerStationElectricRequest(1000)
+    val powerStationElectric = powerStation.generateElectric(electricRequest)
+
+    val homeElectric = powerStationElectric.toHomeElectric()
+
+    val home = Home()
+    home.takeElectric(homeElectric) // 가정은 발전소의 전기를 사용하는 클라이언트 역할을 한다.
+}
diff --git a/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/common/Home.kt b/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/common/Home.kt
new file mode 100644
index 0000000..d9aea56
--- /dev/null
+++ b/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/common/Home.kt	
@@ -0,0 +1,9 @@
+package com.banjjoknim.soliddesignpatternsample.designpattern.adapter.common
+
+class Home(
+    private var electric: HomeElectric = HomeElectric(0)
+) {
+    fun takeElectric(electric: HomeElectric) {
+        this.electric = electric
+    }
+}
diff --git a/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/common/HomeElectric.kt b/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/common/HomeElectric.kt
new file mode 100644
index 0000000..d4bfc8d
--- /dev/null
+++ b/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/common/HomeElectric.kt	
@@ -0,0 +1,5 @@
+package com.banjjoknim.soliddesignpatternsample.designpattern.adapter.common
+
+data class HomeElectric(
+    val current: Int,
+)
diff --git a/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/common/PowerStation.kt b/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/common/PowerStation.kt
new file mode 100644
index 0000000..b75ece9
--- /dev/null
+++ b/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/common/PowerStation.kt	
@@ -0,0 +1,7 @@
+package com.banjjoknim.soliddesignpatternsample.designpattern.adapter.common
+
+class PowerStation {
+    fun generateElectric(request: PowerStationElectricRequest): PowerStationElectric {
+        return PowerStationElectric(request.current)
+    }
+}
diff --git a/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/common/PowerStationElectric.kt b/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/common/PowerStationElectric.kt
new file mode 100644
index 0000000..5f93f21
--- /dev/null
+++ b/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/common/PowerStationElectric.kt	
@@ -0,0 +1,9 @@
+package com.banjjoknim.soliddesignpatternsample.designpattern.adapter.common
+
+data class PowerStationElectric(
+    val current: Int,
+) {
+    fun toHomeElectric(): HomeElectric {
+        return HomeElectric(this.current * (11000 / 220))
+    }
+}
diff --git a/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/common/PowerStationElectricRequest.kt b/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/common/PowerStationElectricRequest.kt
new file mode 100644
index 0000000..f4f87cf
--- /dev/null
+++ b/놀이터(예제 코드 작성)/solid-design-pattern-sample/src/main/kotlin/com/banjjoknim/soliddesignpatternsample/designpattern/adapter/common/PowerStationElectricRequest.kt	
@@ -0,0 +1,5 @@
+package com.banjjoknim.soliddesignpatternsample.designpattern.adapter.common
+
+data class PowerStationElectricRequest(
+    val current: Int
+)