diff --git a/README.md b/README.md
index bd90ef0247..1eeaa721de 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,15 @@
-# java-calculator-precourse
\ No newline at end of file
+# java-calculator-precourse
+
+## 구현할 기능 목록 
+
+- [ ] 문자열 입력과 결과 출력하는 기능 구현
+
+- [ ] 기본 구분자 `쉼표(,)`와 `콜론(:)`으로 숫자 분리하는 기능 구현
+
+- [ ] 커스텀 구분자로 숫자 분리하는 기능 구현
+
+- [ ] 입력값 검증 및 예외 처리하는 기능 구현
+  - 구분자를 제외한 입력값이 음수이거나 숫자가 아닌 경우
+  - 입력값이 빈 문자열인 경우
+
+- [ ] 잘못된 입력값인 경우 `IllegalArgumentException`발생 및 어플리케이션 종료시키는 기능 구현 
\ No newline at end of file
diff --git a/src/main/java/calculator/Application.java b/src/main/java/calculator/Application.java
index 573580fb40..a4dbd17ff9 100644
--- a/src/main/java/calculator/Application.java
+++ b/src/main/java/calculator/Application.java
@@ -1,7 +1,12 @@
 package calculator;
 
+import calculator.controller.CalculatorController;
+
 public class Application {
     public static void main(String[] args) {
         // TODO: 프로그램 구현
+        CalculatorController calculatorController = new CalculatorController();
+        calculatorController.start();
+
     }
 }
diff --git a/src/main/java/calculator/controller/CalculatorController.java b/src/main/java/calculator/controller/CalculatorController.java
new file mode 100644
index 0000000000..ad8cde76e4
--- /dev/null
+++ b/src/main/java/calculator/controller/CalculatorController.java
@@ -0,0 +1,15 @@
+package calculator.controller;
+
+import calculator.model.Calculator;
+import calculator.view.InputView;
+import calculator.view.OutputView;
+
+public class CalculatorController {
+    private final Calculator calculator = new Calculator();
+
+    public void start() {
+        String string = InputView.getInput();
+        int result = calculator.add(string);
+        OutputView.printResult(result);
+    }
+}
diff --git a/src/main/java/calculator/model/Calculator.java b/src/main/java/calculator/model/Calculator.java
new file mode 100644
index 0000000000..1207b43862
--- /dev/null
+++ b/src/main/java/calculator/model/Calculator.java
@@ -0,0 +1,60 @@
+package calculator.model;
+
+import java.util.Arrays;
+
+public class Calculator {
+
+    public int add(String inputString) {
+        checkBlank(inputString);
+
+        if (inputString.startsWith("//")) {
+            int customIndex = inputString.indexOf("\\n");
+            if (customIndex != -1) {
+                String CustomSeparator = inputString.substring(2, customIndex);
+                verifyCustomSeparator(CustomSeparator);
+                String remainString = inputString.substring(customIndex + 2);
+
+                String CustomRegex = "[,:" + CustomSeparator + "]";
+
+                String[] number = remainString.split(CustomRegex);
+                return Arrays.stream(number)
+                        .mapToInt(this::checkNumber)
+                        .peek(this::validateNumber)
+                        .sum();
+            }
+        }
+
+        String[] number = inputString.split("[,:]");
+
+        return Arrays.stream(number)
+                .mapToInt(this::checkNumber)
+                .peek(this::validateNumber)
+                .sum();
+    }
+
+    private int checkNumber(String input) {
+        try {
+            return Integer.parseInt(input);
+        } catch (NumberFormatException e) {
+            throw new IllegalArgumentException("숫자만 입력해주세요!!!");
+        }
+    }
+
+    private void validateNumber(int number) {
+        if (number < 0) {
+            throw new IllegalArgumentException("양수만 입력해주세요!!!");
+        }
+    }
+
+    private void checkBlank(String string) {
+        if (string.isBlank()) {
+            throw new IllegalArgumentException("문자열을 입력해 주세요!!!");
+        }
+    }
+
+    private void verifyCustomSeparator(String custom) {
+        if (custom.matches(".*\\d.*")) {
+            throw  new IllegalArgumentException("커스텀 구분자로 숫자를 사용할 수 없어요!!!");
+        }
+    }
+}
diff --git a/src/main/java/calculator/view/InputView.java b/src/main/java/calculator/view/InputView.java
new file mode 100644
index 0000000000..e9bb774994
--- /dev/null
+++ b/src/main/java/calculator/view/InputView.java
@@ -0,0 +1,12 @@
+package calculator.view;
+
+import camp.nextstep.edu.missionutils.Console;
+
+public class InputView {
+
+    public static String getInput() {
+        System.out.println("문자열을 입력해주세요: ");
+
+        return Console.readLine();
+    }
+}
diff --git a/src/main/java/calculator/view/OutputView.java b/src/main/java/calculator/view/OutputView.java
new file mode 100644
index 0000000000..82679039ad
--- /dev/null
+++ b/src/main/java/calculator/view/OutputView.java
@@ -0,0 +1,8 @@
+package calculator.view;
+
+public class OutputView {
+
+    public static void printResult(int result) {
+        System.out.println("결과: " + result);
+    }
+}