diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 35a0b72..30bbf20 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -2,7 +2,6 @@ plugins {
     alias(libs.plugins.android.application)
     alias(libs.plugins.kotlin.android)
     alias(libs.plugins.kotlinKapt)
-    alias(libs.plugins.google.gms.google.services)
 }
 
 android {
@@ -64,6 +63,17 @@ dependencies {
     implementation("androidx.room:room-runtime:2.8.3")
     kapt("androidx.room:room-compiler:2.8.3")
 
-    implementation (platform("com.google.firebase:firebase-bom:34.5.0"))
-    implementation ("com.google.firebase:firebase-database-ktx:21.0.0")
+    //Retrofit
+    implementation ("com.squareup.retrofit2:retrofit:2.9.0")
+    implementation ("com.squareup.retrofit2:converter-gson:2.9.0")
+    implementation ("com.squareup.retrofit2:adapter-rxjava2:2.9.0")
+
+    //okHttp
+    implementation ("com.squareup.okhttp3:okhttp:4.9.0")
+    implementation ("com.squareup.okhttp3:logging-interceptor:4.9.0")
+
+    //Glide
+    implementation ("com.github.bumptech.glide:glide:4.11.0")
+    annotationProcessor ("com.github.bumptech.glide:compiler:4.11.0")
+
 }
\ No newline at end of file
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 344f714..0a9583c 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -2,6 +2,8 @@
 <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:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
@@ -25,6 +27,8 @@
         <activity
             android:name=".SongActivity"
             android:exported="true" />
+        <activity android:name=".LoginActivity" android:exported="true"/>
+        <activity android:name=".SignupActivity" android:exported="true"/>
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/com/keder/flo/AuthResponse.kt b/app/src/main/java/com/keder/flo/AuthResponse.kt
new file mode 100644
index 0000000..bbd479b
--- /dev/null
+++ b/app/src/main/java/com/keder/flo/AuthResponse.kt
@@ -0,0 +1,17 @@
+package com.keder.flo
+
+import com.google.gson.annotations.SerializedName
+
+
+data class AuthResponse(
+    @SerializedName("isSuccess") val isSuccess: Boolean,
+    @SerializedName("code") val code: String,
+    @SerializedName("message") val message: String,
+    @SerializedName("result") val result: Result?
+
+)
+
+data class Result(
+    @SerializedName("userIdx") val userIdx: Int,
+    @SerializedName("jwt") val jwt: String
+)
\ No newline at end of file
diff --git a/app/src/main/java/com/keder/flo/AuthRetrofitInterface.kt b/app/src/main/java/com/keder/flo/AuthRetrofitInterface.kt
new file mode 100644
index 0000000..1e30636
--- /dev/null
+++ b/app/src/main/java/com/keder/flo/AuthRetrofitInterface.kt
@@ -0,0 +1,14 @@
+package com.keder.flo
+
+import retrofit2.Call
+import retrofit2.http.Body
+import retrofit2.http.POST
+
+interface AuthRetrofitInterface {
+    @POST("/users")
+    fun signUp(@Body user: User): Call<AuthResponse>
+
+    @POST("/users/login")
+    fun login(@Body user: User): Call<AuthResponse>
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/keder/flo/SignupActivity.kt b/app/src/main/java/com/keder/flo/SignupActivity.kt
index 79ab10d..851634e 100644
--- a/app/src/main/java/com/keder/flo/SignupActivity.kt
+++ b/app/src/main/java/com/keder/flo/SignupActivity.kt
@@ -1,14 +1,20 @@
 package com.keder.flo
 
-import android.content.Intent
 import android.os.Bundle
 import android.util.Log
+import android.view.View
 import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
+import com.keder.flo.User
 import com.keder.flo.databinding.ActivitySignupBinding
+import retrofit2.Call
+import retrofit2.Callback
+import retrofit2.Response
 
-class SignupActivity : AppCompatActivity() {
-    private  lateinit var binding : ActivitySignupBinding
+
+class SignUpActivity : AppCompatActivity(){
+
+    lateinit var binding: ActivitySignupBinding
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -17,31 +23,78 @@ class SignupActivity : AppCompatActivity() {
 
         binding.signupSignupBtn.setOnClickListener {
             signUp()
-            finish()
         }
     }
 
-    private fun getUser() : User{
-        val email : String = binding.signupIdEt.text.toString() + "@" + binding.signupInputIdEt.text.toString()
-        val pwd : String = binding.signupPasswordEt.text.toString()
+    private fun getUser(): User {
+        val email: String =
+            binding.signupIdEt.text.toString() + "@" + binding.signupInputIdEt.text.toString()
+        val name: String = binding.signUpNameEt.text.toString()
+        val pwd: String = binding.signupPasswordEt.text.toString()
 
-        return User(email, pwd)
+        return User(email, pwd, name)
     }
 
-    private fun signUp(){
-        if(binding.signupIdEt.text.toString().isEmpty() ||  binding.signupInputIdEt.text.toString().isEmpty()){
+//    private fun signUp() {
+//        if (binding.signUpIdEt.text.toString().isEmpty() || binding.signUpDirectInputEt.text.toString().isEmpty()) {
+//            Toast.makeText(this, "이메일 형식이 잘못되었습니다.", Toast.LENGTH_SHORT).show()
+//            return
+//        }
+//
+//        if (binding.signUpPasswordEt.text.toString() != binding.signUpPasswordCheckEt.text.toString()) {
+//            Toast.makeText(this, "비밀번호가 일치하지 않습니다.", Toast.LENGTH_SHORT).show()
+//            return
+//        }
+//
+//        val userDB = SongDatabase.getInstance(this)!!
+//        userDB.userDao().insert(getUser())
+//
+//        val users = userDB.userDao().getUsers()
+//
+//        Log.d("SIGNUPACT", users.toString())
+//    }
+
+    private fun signUp() {
+        if (binding.signupIdEt.text.toString()
+                .isEmpty() || binding.signupInputIdEt.text.toString().isEmpty()
+        ) {
             Toast.makeText(this, "이메일 형식이 잘못되었습니다.", Toast.LENGTH_SHORT).show()
             return
         }
-        if(binding.signupPasswordEt.text.toString() != binding.signupPwCheckEt.text.toString()){
+
+        if (binding.signupPasswordEt.text.toString() != binding.signupPwCheckEt.text.toString()) {
             Toast.makeText(this, "비밀번호가 일치하지 않습니다.", Toast.LENGTH_SHORT).show()
             return
         }
 
-        val userDB = SongDatabase.getInstance(this)!!
-        userDB.userDao().insert(getUser())
+        val authService = getRetrofit().create(AuthRetrofitInterface::class.java)
+        authService.signUp(getUser()).enqueue(object: Callback<AuthResponse>{
+            override fun onResponse(
+                call: Call<AuthResponse?>,
+                response: Response<AuthResponse?>
+            ) {
+                Log.d("SIGNUP/SUCCESS", "Hello, FLO")
+                val resp: AuthResponse = response.body()!!
+                when(resp.code){
+                    "COMMON201" -> finish()
+                    "AUTH400_1" -> {
+                        binding.signUpEmailErrorTv.visibility = View.VISIBLE
+                        binding.signUpEmailErrorTv.text = resp.message
+                    }
+                }
+            }
 
-        val user = userDB.userDao().getUsers()
-        Log.d("SIGNUPACT", user.toString())
+            override fun onFailure(
+                call: Call<AuthResponse?>,
+                t: Throwable
+            ) {
+                Log.d("SIGNUP/FAILURE", "Hello, FLO")
+            }
+
+        })
+
+
+        Log.d("SIGNUP-ACT/ASYNC", "Hello, FLO")
     }
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/keder/flo/User.kt b/app/src/main/java/com/keder/flo/User.kt
new file mode 100644
index 0000000..9128d44
--- /dev/null
+++ b/app/src/main/java/com/keder/flo/User.kt
@@ -0,0 +1,14 @@
+package com.keder.flo
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import com.google.gson.annotations.SerializedName
+
+@Entity(tableName = "UserTable")
+data class User(
+    @SerializedName(value="email") var email : String,
+    @SerializedName(value="pasword") var password : String,
+    @SerializedName(value="name") var name : String,
+){
+    @PrimaryKey(autoGenerate = true) var id : Int = 0
+}
diff --git a/app/src/main/res/layout/activity_signup.xml b/app/src/main/res/layout/activity_signup.xml
index ce9be7c..2baf7be 100644
--- a/app/src/main/res/layout/activity_signup.xml
+++ b/app/src/main/res/layout/activity_signup.xml
@@ -89,6 +89,43 @@
         app:layout_constraintEnd_toEndOf="@id/signup_input_id_et"
         app:layout_constraintTop_toTopOf="@id/signup_input_id_et"/>
 
+
+    <TextView
+        android:id="@+id/sign_up_email_error_tv"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textColor="@color/design_default_color_error"
+        android:textSize="14sp"
+        android:textStyle="bold"
+        android:layout_marginTop="10dp"
+        android:layout_marginStart="20dp"
+        android:visibility="gone"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/signup_id_underline_v"/>
+
+    <EditText
+        android:id="@+id/sign_up_name_et"
+        android:layout_width="150dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="20dp"
+        android:layout_marginTop="30dp"
+        android:layout_marginEnd="20dp"
+        android:background="@null"
+        android:hint="이름"
+        android:inputType="textPersonName"
+        android:textSize="16sp"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/sign_up_email_error_tv" />
+
+    <View
+        android:id="@+id/sign_up_name_underscore_view"
+        android:layout_width="150dp"
+        android:layout_height="1px"
+        android:layout_marginTop="15dp"
+        android:background="#a8a8a8"
+        app:layout_constraintStart_toStartOf="@+id/signup_password_et"
+        app:layout_constraintTop_toBottomOf="@+id/sign_up_name_et"/>
+
     <EditText
         android:id="@+id/signup_password_et"
         android:layout_width="0dp"
@@ -102,7 +139,7 @@
         android:textSize="16sp"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/signup_address_underline_v"/>
+        app:layout_constraintTop_toBottomOf="@id/sign_up_name_underscore_view"/>
 
     <View
         android:id="@+id/signup_pw_underline_v"