diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index f004384b..707b643b 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -1,5 +1,3 @@
-import org.jetbrains.kotlin.storage.CacheResetOnProcessCanceled.enabled
-
 plugins {
     id("com.android.application")
     id("org.jetbrains.kotlin.android")
@@ -42,6 +40,7 @@ android {
 }
 
 dependencies {
+    implementation ("com.kakao.sdk:v2-user:2.19.0") // 카카오 로그인
 
     implementation("androidx.core:core-ktx:1.9.0")
     implementation("androidx.appcompat:appcompat:1.6.1")
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index c497668e..a46ebf1c 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -2,7 +2,10 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <uses-permission android:name="android.permission.INTERNET" />
+
     <application
+        android:name=".GlobalApplication"
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
         android:fullBackupContent="@xml/backup_rules"
@@ -12,11 +15,12 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.CampusNote"
         tools:targetApi="31">
+
+        <activity android:name=".MainActivity"
+            android:exported="false"/>
+
         <activity
-            android:name=".MainActivity"
-            android:exported="false" />
-        <activity
-            android:name=".signUp.SignUpActivity"
+            android:name=".LoginActivity"
             android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
@@ -24,6 +28,18 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+
+        <activity android:name="com.kakao.sdk.auth.AuthCodeHandlerActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+
+                <data android:host="oauth"
+                    android:scheme="kakao3fb9a572bb1f2e3cd66d370d2f7888dd" />
+            </intent-filter>
+        </activity>
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/com/notation/campusnote/GlobalApplication.kt b/app/src/main/java/com/notation/campusnote/GlobalApplication.kt
new file mode 100644
index 00000000..749a4b4a
--- /dev/null
+++ b/app/src/main/java/com/notation/campusnote/GlobalApplication.kt
@@ -0,0 +1,18 @@
+package com.notation.campusnote
+
+import android.app.Application
+import android.util.Log
+import com.kakao.sdk.common.KakaoSdk
+import com.kakao.sdk.common.util.Utility
+
+
+class GlobalApplication : Application() {
+    override fun onCreate() {
+        super.onCreate()
+
+        //Kakao SDK 초기화
+        KakaoSdk.init(this, "3fb9a572bb1f2e3cd66d370d2f7888dd")
+
+        Log.d("hash", "keyhash : ${Utility.getKeyHash(this)}")
+    }
+}
diff --git a/app/src/main/java/com/notation/campusnote/LoginActivity.kt b/app/src/main/java/com/notation/campusnote/LoginActivity.kt
new file mode 100644
index 00000000..954a0404
--- /dev/null
+++ b/app/src/main/java/com/notation/campusnote/LoginActivity.kt
@@ -0,0 +1,49 @@
+package com.notation.campusnote
+
+import android.os.Bundle
+import android.util.Log
+import androidx.appcompat.app.AppCompatActivity
+import com.notation.campusnote.databinding.ActivityLoginBinding
+import com.kakao.sdk.auth.model.OAuthToken
+import com.kakao.sdk.user.UserApiClient
+
+class LoginActivity :AppCompatActivity(){
+    private val TAG = "KakaoLoginExample"
+    private lateinit var binding: ActivityLoginBinding
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityLoginBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        binding.kakaoLoginButton.setOnClickListener {
+            login()
+        }
+    }
+
+    private fun login() {
+        // 카카오계정으로 로그인 공통 콜백 설정
+        val callback: (OAuthToken?, Throwable?) -> Unit = { token, error ->
+            if (error != null) {
+                Log.e(TAG, "카카오계정으로 로그인 실패", error)
+            } else if (token != null) {
+                Log.i(TAG, "카카오계정으로 로그인 성공 ${token.accessToken}")
+            }
+        }
+
+        // 카카오톡이 설치되어 있으면 카카오톡으로 로그인, 아니면 카카오계정으로 로그인
+        if (UserApiClient.instance.isKakaoTalkLoginAvailable(this)) {
+            UserApiClient.instance.loginWithKakaoTalk(this) { token, error ->
+                if (error != null) {
+                    Log.e(TAG, "카카오톡으로 로그인 실패", error)
+
+                    // 특정 상황(취소 등)에 대한 처리 추가
+                } else if (token != null) {
+                    Log.i(TAG, "카카오톡으로 로그인 성공 ${token.accessToken}")
+                    // 성공적인 로그인 처리 추가
+                }
+            }
+        } else {
+            UserApiClient.instance.loginWithKakaoAccount(this, callback = callback)
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/res/drawable/icon_kakao.xml b/app/src/main/res/drawable/icon_kakao.xml
new file mode 100644
index 00000000..bc828ab4
--- /dev/null
+++ b/app/src/main/res/drawable/icon_kakao.xml
@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="28dp"
+    android:height="27dp"
+    android:viewportWidth="28"
+    android:viewportHeight="27">
+  <path
+      android:pathData="M14,0.963C6.268,0.963 0,5.75 0,11.653C0,15.324 2.424,18.56 6.116,20.485L4.563,26.093C4.425,26.588 4.999,26.983 5.439,26.696L12.248,22.255C12.822,22.31 13.406,22.342 14,22.342C21.732,22.342 28,17.556 28,11.653C28,5.75 21.732,0.963 14,0.963Z"
+      android:fillColor="#000000"
+      android:fillType="evenOdd"/>
+</vector>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_login.xml b/app/src/main/res/layout/activity_login.xml
new file mode 100644
index 00000000..6de5c611
--- /dev/null
+++ b/app/src/main/res/layout/activity_login.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".LoginActivity">
+
+
+    <Button
+    android:id="@+id/kakao_login_button"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:text="카카오 로그인"
+    android:background="@color/black"
+    app:layout_constraintLeft_toLeftOf="parent"
+    app:layout_constraintRight_toRightOf="parent"
+    app:layout_constraintBottom_toBottomOf="parent"
+    android:layout_marginBottom="40dp"/>
+
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 5eda9897..3a650033 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -10,6 +10,7 @@ dependencyResolutionManagement {
     repositories {
         google()
         mavenCentral()
+        maven("https://devrepo.kakao.com/nexus/content/groups/public/")
     }
 }