diff --git a/29th_first_semina/app/build.gradle b/29th_first_semina/app/build.gradle
index 211b7b2..a83babc 100644
--- a/29th_first_semina/app/build.gradle
+++ b/29th_first_semina/app/build.gradle
@@ -38,6 +38,9 @@ android {
 
 dependencies {
 
+    implementation "com.squareup.retrofit2:retrofit:2.9.0"
+    implementation "com.squareup.retrofit2:converter-gson:2.9.0"
+    implementation "com.google.code.gson:gson:2.8.6"
     implementation 'com.github.bumptech.glide:glide:4.12.0'
     annotationProcessor 'com.github.bumptech.glide:compiler:4.12.0'
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
diff --git a/29th_first_semina/app/src/main/AndroidManifest.xml b/29th_first_semina/app/src/main/AndroidManifest.xml
index 09ee285..c8f1704 100644
--- a/29th_first_semina/app/src/main/AndroidManifest.xml
+++ b/29th_first_semina/app/src/main/AndroidManifest.xml
@@ -5,20 +5,14 @@
     <uses-permission android:name="android.permission.INTERNET"/>
 
     <application
+        android:usesCleartextTraffic="true"
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.29th_first_semina">
-        <activity android:name=".SampleActivity" >
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity>
-        <activity android:name=".ui.view.sigin.SignUpActivity" />
+        <activity android:name=".ui.view.sigin.view.SignUpActivity" />
         <activity
             android:name=".ui.view.home.HomeActivity"
             android:exported="false">
@@ -28,7 +22,7 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
-        <activity android:name=".ui.view.sigin.SignInActivity">
+        <activity android:name=".ui.view.sigin.view.SignInActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 
diff --git a/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/SignInActivity.kt b/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/SignInActivity.kt
deleted file mode 100644
index fd1f25e..0000000
--- a/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/SignInActivity.kt
+++ /dev/null
@@ -1,61 +0,0 @@
-package com.example.a29th_first_semina.ui.view.sigin
-
-import android.content.Intent
-import androidx.appcompat.app.AppCompatActivity
-import android.os.Bundle
-import android.widget.Toast
-import com.example.a29th_first_semina.databinding.ActivitySigninBinding
-import com.example.a29th_first_semina.ui.view.home.HomeActivity
-
-class SignInActivity : AppCompatActivity() {
-    private lateinit var binding: ActivitySigninBinding
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
-        binding = ActivitySigninBinding.inflate(layoutInflater)
-        setContentView(binding.root)
-        initButtonClickEvent()
-
-    }
-
-    private fun initButtonClickEvent() {
-
-        clickLoginEvent()
-        clickSignUpEvent()
-    }
-
-    private fun moveHomeActivity() {
-        val homeIntent = Intent(this, HomeActivity::class.java)
-        startActivity(homeIntent)
-    }
-
-    private fun moveSignUpActivity() {
-        val signupIntent = Intent(this, SignUpActivity::class.java)
-        startActivity(signupIntent)
-
-    }
-
-    private fun clickLoginEvent() {
-
-        with(binding) {
-            btnLogin.setOnClickListener {
-                val userId = etId.text
-                val userPassword= etPwd.text
-                if (userId.isEmpty() || userPassword.isEmpty()) {
-                    Toast.makeText(this@SignInActivity, "로그인 실패", Toast.LENGTH_SHORT).show()
-                } else {
-                    moveHomeActivity()
-                }
-
-            }
-
-        }
-
-    }
-
-    private fun clickSignUpEvent() {
-        binding.tvSignup.setOnClickListener {
-            moveSignUpActivity()
-        }
-
-    }
-}
\ No newline at end of file
diff --git a/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/SignUpActivity.kt b/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/SignUpActivity.kt
deleted file mode 100644
index 199b107..0000000
--- a/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/SignUpActivity.kt
+++ /dev/null
@@ -1,41 +0,0 @@
-package com.example.a29th_first_semina.ui.view.sigin
-
-import androidx.appcompat.app.AppCompatActivity
-import android.os.Bundle
-import android.widget.Toast
-import com.example.a29th_first_semina.databinding.ActivitySignUpBinding
-
-class SignUpActivity : AppCompatActivity() {
-    private lateinit var binding: ActivitySignUpBinding
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
-        binding = ActivitySignUpBinding.inflate(layoutInflater)
-        setContentView(binding.root)
-        initButtonClick()
-    }
-
-    private fun initButtonClick() {
-        clickSignUpEvent()
-    }
-
-    private fun clickSignUpEvent() {
-
-        binding.apply {
-            val userName = etName.text
-            val userId = etId.text
-            val userPwd = etPwd.text
-
-            btnSignup.setOnClickListener {
-                if (userName.isEmpty() || userId.isEmpty() || userPwd.isEmpty() ){
-                    Toast.makeText(this@SignUpActivity, "입력되지 않은 정보가 있습니다", Toast.LENGTH_SHORT)
-                        .show()
-                }
-                else {
-                    finish()
-                }
-            }
-        }
-
-
-    }
-}
\ No newline at end of file
diff --git a/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/data/RequsetLoginData.kt b/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/data/RequsetLoginData.kt
new file mode 100644
index 0000000..1c21f47
--- /dev/null
+++ b/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/data/RequsetLoginData.kt
@@ -0,0 +1,9 @@
+package com.example.a29th_first_semina.ui.view.sigin.data
+
+import com.google.gson.annotations.SerializedName
+
+data class RequsetLoginData(
+    @SerializedName("email")
+    val email : String,
+    val password : String,
+)
diff --git a/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/data/RequsetSignUpdata.kt b/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/data/RequsetSignUpdata.kt
new file mode 100644
index 0000000..8eb3dec
--- /dev/null
+++ b/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/data/RequsetSignUpdata.kt
@@ -0,0 +1,8 @@
+package com.example.a29th_first_semina.ui.view.sigin.data
+
+data class RequsetSignUpdata(
+    val email : String,
+    val name : String,
+    val password : String,
+
+)
diff --git a/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/data/ResponseLoginData.kt b/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/data/ResponseLoginData.kt
new file mode 100644
index 0000000..bced1c6
--- /dev/null
+++ b/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/data/ResponseLoginData.kt
@@ -0,0 +1,15 @@
+package com.example.a29th_first_semina.ui.view.sigin.data
+
+data class ResponseLoginData(
+    val status : Int,
+    val success : Boolean,
+    val message : String,
+    val data : Data
+) {
+
+    data class Data(
+        val id: Int,
+        val name: String,
+        val email: String
+    )
+}
diff --git a/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/data/ResponseSignUpData.kt b/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/data/ResponseSignUpData.kt
new file mode 100644
index 0000000..f8b1388
--- /dev/null
+++ b/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/data/ResponseSignUpData.kt
@@ -0,0 +1,17 @@
+package com.example.a29th_first_semina.ui.view.sigin.data
+
+data class ResponseSignUpData(
+
+    val status : Int,
+    val success : Boolean,
+    val message : String,
+    val data : Data
+) {
+
+    data class Data(
+        val id: Int,
+        val name: String,
+        val email: String
+
+    )
+}
diff --git a/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/di/Service.kt b/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/di/Service.kt
new file mode 100644
index 0000000..462e1b6
--- /dev/null
+++ b/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/di/Service.kt
@@ -0,0 +1,24 @@
+package com.example.a29th_first_semina.ui.view.sigin.di
+
+import android.telecom.Call
+import com.example.a29th_first_semina.ui.view.sigin.data.RequsetLoginData
+import com.example.a29th_first_semina.ui.view.sigin.data.RequsetSignUpdata
+import com.example.a29th_first_semina.ui.view.sigin.data.ResponseLoginData
+import com.example.a29th_first_semina.ui.view.sigin.data.ResponseSignUpData
+import retrofit2.http.Body
+import retrofit2.http.Headers
+import retrofit2.http.POST
+
+interface Service {
+    @Headers("Content-Type:application/json")
+    @POST("user/login")
+    fun postLogin(
+        @Body body : RequsetLoginData
+    ) : retrofit2.Call <ResponseLoginData>
+
+
+    @POST("user/signup")
+    fun postSignup(
+        @Body body : RequsetSignUpdata
+    ) : retrofit2.Call <ResponseSignUpData>
+}
\ No newline at end of file
diff --git a/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/di/ServiceCreater.kt b/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/di/ServiceCreater.kt
new file mode 100644
index 0000000..aca30ac
--- /dev/null
+++ b/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/di/ServiceCreater.kt
@@ -0,0 +1,18 @@
+package com.example.a29th_first_semina.ui.view.sigin.di
+
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+
+object ServiceCreater {
+
+    private const val BASE_URL = "https://asia-northeast3-we-sopt-29.cloudfunctions.net/api/"
+
+    private val retrofit : Retrofit = Retrofit.Builder()
+        .baseUrl(BASE_URL)
+        .addConverterFactory(GsonConverterFactory.create())
+        .build()
+
+    val service : Service = retrofit.create(Service::class.java)
+
+
+}
\ No newline at end of file
diff --git a/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/view/SignInActivity.kt b/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/view/SignInActivity.kt
new file mode 100644
index 0000000..2e413e8
--- /dev/null
+++ b/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/view/SignInActivity.kt
@@ -0,0 +1,101 @@
+package com.example.a29th_first_semina.ui.view.sigin.view
+
+import android.content.Intent
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.util.Log
+import android.widget.Toast
+import com.example.a29th_first_semina.databinding.ActivitySigninBinding
+import com.example.a29th_first_semina.ui.view.home.HomeActivity
+import com.example.a29th_first_semina.ui.view.sigin.di.ServiceCreater
+import com.example.a29th_first_semina.ui.view.sigin.data.RequsetLoginData
+import com.example.a29th_first_semina.ui.view.sigin.data.ResponseLoginData
+import retrofit2.Callback
+import retrofit2.Response
+
+class SignInActivity : AppCompatActivity() {
+    private lateinit var binding: ActivitySigninBinding
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivitySigninBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+        initButtonClickEvent()
+
+    }
+
+    private fun initButtonClickEvent() {
+
+        clickLoginEvent()
+        clickSignUpEvent()
+    }
+
+    private fun moveHomeActivity() {
+        val homeIntent = Intent(this, HomeActivity::class.java)
+        startActivity(homeIntent)
+    }
+
+    private fun moveSignUpActivity() {
+        val signupIntent = Intent(this, SignUpActivity::class.java)
+        startActivity(signupIntent)
+
+    }
+
+    private fun clickLoginEvent() {
+
+        with(binding) {
+            btnLogin.setOnClickListener {
+                val userId = etId.text
+                val userPassword= etPwd.text
+                if (userId.isEmpty() || userPassword.isEmpty()) {
+                    Toast.makeText(this@SignInActivity, "아이디/비번 둘 다 입력해라", Toast.LENGTH_SHORT).show()
+                } else {
+                    initNetwork()
+                }
+
+            }
+
+        }
+
+    }
+
+    private fun clickSignUpEvent() {
+        binding.tvSignup.setOnClickListener {
+            moveSignUpActivity()
+        }
+
+    }
+
+    private fun initNetwork(){
+        val requsetLoginData = RequsetLoginData(
+            email = binding.etId.text.toString(),
+            password = binding.etPwd.text.toString()
+        )
+
+        val call : retrofit2.Call<ResponseLoginData> = ServiceCreater.service.postLogin(requsetLoginData)
+
+        call.enqueue(object : Callback<ResponseLoginData>{
+            override fun onResponse(
+                call: retrofit2.Call<ResponseLoginData>,
+                response: Response<ResponseLoginData>
+            ) {
+                if(response.isSuccessful){
+                    val data = response.body()?.data
+                    moveHomeActivity()
+                    Log.d("서버통신 상태",response.body()?.status.toString())
+                }
+                else {
+                    Toast.makeText(
+                        this@SignInActivity,
+                        response.body()?.status.toString(),
+                        Toast.LENGTH_SHORT
+                    ).show()
+                    Log.d("서버통신 상태", response.body()?.status.toString())
+                }
+            }
+
+            override fun onFailure(call: retrofit2.Call<ResponseLoginData>, t: Throwable) {
+                Log.d("로그인통신 실패","실패임")
+            }
+        })
+    }
+}
\ No newline at end of file
diff --git a/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/view/SignUpActivity.kt b/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/view/SignUpActivity.kt
new file mode 100644
index 0000000..43010ca
--- /dev/null
+++ b/29th_first_semina/app/src/main/java/com/example/a29th_first_semina/ui/view/sigin/view/SignUpActivity.kt
@@ -0,0 +1,81 @@
+package com.example.a29th_first_semina.ui.view.sigin.view
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.util.Log
+import android.widget.Toast
+import com.example.a29th_first_semina.databinding.ActivitySignUpBinding
+import com.example.a29th_first_semina.ui.view.sigin.di.ServiceCreater
+import com.example.a29th_first_semina.ui.view.sigin.data.RequsetSignUpdata
+import com.example.a29th_first_semina.ui.view.sigin.data.ResponseSignUpData
+import retrofit2.Call
+import retrofit2.Callback
+import retrofit2.Response
+
+class SignUpActivity : AppCompatActivity() {
+    private lateinit var binding: ActivitySignUpBinding
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivitySignUpBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+        initButtonClick()
+    }
+
+    private fun initButtonClick() {
+        clickSignUpEvent()
+    }
+
+    private fun clickSignUpEvent() {
+
+        binding.apply {
+            val userName = etName.text
+            val userId = etId.text
+            val userPwd = etPwd.text
+
+            btnSignup.setOnClickListener {
+                if (userName.isEmpty() || userId.isEmpty() || userPwd.isEmpty() ){
+                    Toast.makeText(this@SignUpActivity, "입력되지 않은 정보가 있습니다", Toast.LENGTH_SHORT)
+                        .show()
+                }
+                else {
+                    initNetwork()
+                }
+            }
+        }
+
+
+    }
+
+    private fun initNetwork() {
+        val requsetSignupData = RequsetSignUpdata(
+            email = binding.etId.text.toString(),
+            password =  binding.etPwd.toString(),
+            name = binding.etName.toString()
+        )
+
+        val call : Call<ResponseSignUpData> = ServiceCreater.service.postSignup(requsetSignupData)
+
+        call.enqueue(object : Callback<ResponseSignUpData>{
+            override fun onResponse(
+                call: Call<ResponseSignUpData>,
+                response: Response<ResponseSignUpData>
+            ) {
+                if(response.isSuccessful){
+                    val data = response.body()?.data
+                    Log.d("서버통신 상태", response.body()?.status.toString())
+                    finish()
+                }
+
+                else{
+                    Log.d("서버통신 상태", response.body()?.status.toString())
+                }
+            }
+
+            override fun onFailure(call: Call<ResponseSignUpData>, t: Throwable) {
+                Log.d("서버통신 상태", "실패")
+            }
+        })
+
+
+    }
+}
\ No newline at end of file
diff --git a/29th_first_semina/app/src/main/res/layout/activity_sign_up.xml b/29th_first_semina/app/src/main/res/layout/activity_sign_up.xml
index f39715a..a33cdcb 100644
--- a/29th_first_semina/app/src/main/res/layout/activity_sign_up.xml
+++ b/29th_first_semina/app/src/main/res/layout/activity_sign_up.xml
@@ -5,7 +5,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="@color/white"
-    tools:context=".ui.view.sigin.SignUpActivity">
+    tools:context=".ui.view.sigin.view.SignUpActivity">
 
 
     <TextView
@@ -151,7 +151,7 @@
         android:id="@+id/btn_signup"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
-        android:background="@drawable/selector_sample_text"
+        android:background="@drawable/rectangle_fill_pink"
         android:fontFamily="@font/notosanskr_bold"
         android:text="@string/signin"
         android:textColor="@color/white"
diff --git a/29th_first_semina/app/src/main/res/layout/activity_signin.xml b/29th_first_semina/app/src/main/res/layout/activity_signin.xml
index 21422ae..4b7fe8e 100644
--- a/29th_first_semina/app/src/main/res/layout/activity_signin.xml
+++ b/29th_first_semina/app/src/main/res/layout/activity_signin.xml
@@ -5,7 +5,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="@color/white"
-    tools:context=".ui.view.sigin.SignInActivity">
+    tools:context=".ui.view.sigin.view.SignInActivity">
 
     <ImageView
         android:id="@+id/iv_github"