diff --git a/backend/src/main/kotlin/com/andlife/InvitationServer/controller/SampleController.kt b/backend/src/main/kotlin/com/andlife/InvitationServer/controller/SampleController.kt
index d699ff36..106d1a95 100644
--- a/backend/src/main/kotlin/com/andlife/InvitationServer/controller/SampleController.kt
+++ b/backend/src/main/kotlin/com/andlife/InvitationServer/controller/SampleController.kt
@@ -1,6 +1,7 @@
 package com.andlife.InvitationServer.controller
 
 import com.andlife.InvitationServer.entity.Sample
+import com.andlife.InvitationServer.response.BaseResponse
 import com.andlife.InvitationServer.service.SampleService
 import org.springframework.web.bind.annotation.GetMapping
 import org.springframework.web.bind.annotation.RestController
@@ -11,8 +12,9 @@ class SampleController(
 ) {
 
     @GetMapping("/")
-    fun getSamples(): List<Sample> {
-        return sampleService.getAllSamples()
+    fun getSamples(): BaseResponse<List<Sample>> {
+        val samples = sampleService.getAllSamples()
+        return BaseResponse.success(samples)
     }
 
 }
\ No newline at end of file
diff --git a/backend/src/main/kotlin/com/andlife/InvitationServer/entity/AnnouncementSection.kt b/backend/src/main/kotlin/com/andlife/InvitationServer/entity/AnnouncementSection.kt
new file mode 100644
index 00000000..0cac1c0e
--- /dev/null
+++ b/backend/src/main/kotlin/com/andlife/InvitationServer/entity/AnnouncementSection.kt
@@ -0,0 +1,32 @@
+package com.andlife.InvitationServer.entity
+
+import jakarta.persistence.Column
+import jakarta.persistence.Entity
+import jakarta.persistence.FetchType
+import jakarta.persistence.GeneratedValue
+import jakarta.persistence.GenerationType
+import jakarta.persistence.Id
+import jakarta.persistence.JoinColumn
+import jakarta.persistence.ManyToOne
+import jakarta.persistence.Table
+
+@Entity
+@Table(name = "announcement_sections")
+class AnnouncementSection(
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    val id: Long = 0,
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "invitation_id")
+    val invitation: Invitation,
+
+    @Column(nullable = false)
+    val title: String,
+
+    @Column(nullable = false)
+    val content: String,
+
+    @Column(name = "display_order", nullable = false)
+    val displayOrder: Int,
+): BaseCreatedEntity()
\ No newline at end of file
diff --git a/backend/src/main/kotlin/com/andlife/InvitationServer/entity/BaseTimeEntity.kt b/backend/src/main/kotlin/com/andlife/InvitationServer/entity/BaseTimeEntity.kt
new file mode 100644
index 00000000..714ce84d
--- /dev/null
+++ b/backend/src/main/kotlin/com/andlife/InvitationServer/entity/BaseTimeEntity.kt
@@ -0,0 +1,24 @@
+package com.andlife.InvitationServer.entity
+
+import jakarta.persistence.Column
+import jakarta.persistence.EntityListeners
+import jakarta.persistence.MappedSuperclass
+import org.hibernate.annotations.CreationTimestamp
+import org.hibernate.annotations.UpdateTimestamp
+import org.springframework.data.jpa.domain.support.AuditingEntityListener
+import java.time.LocalDateTime
+
+@MappedSuperclass
+@EntityListeners(AuditingEntityListener::class)
+abstract class BaseCreatedEntity {
+    @CreationTimestamp
+    @Column(name = "created_at", nullable = false, updatable = false)
+    val createdAt: LocalDateTime = LocalDateTime.now()
+}
+
+@MappedSuperclass
+abstract class BaseTimeEntity : BaseCreatedEntity() {
+    @UpdateTimestamp
+    @Column(name = "updated_at", nullable = false)
+    var updatedAt: LocalDateTime = LocalDateTime.now()
+}
\ No newline at end of file
diff --git a/backend/src/main/kotlin/com/andlife/InvitationServer/entity/GuestBook.kt b/backend/src/main/kotlin/com/andlife/InvitationServer/entity/GuestBook.kt
new file mode 100644
index 00000000..45dd036b
--- /dev/null
+++ b/backend/src/main/kotlin/com/andlife/InvitationServer/entity/GuestBook.kt
@@ -0,0 +1,123 @@
+package com.andlife.InvitationServer.entity
+
+import jakarta.persistence.CascadeType
+import jakarta.persistence.Column
+import jakarta.persistence.Entity
+import jakarta.persistence.FetchType
+import jakarta.persistence.GeneratedValue
+import jakarta.persistence.GenerationType
+import jakarta.persistence.Id
+import jakarta.persistence.JoinColumn
+import jakarta.persistence.ManyToOne
+import jakarta.persistence.OneToMany
+import jakarta.persistence.Table
+
+@Entity
+@Table(name = "guestbooks")
+class GuestBook(
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    val id: Long = 0,
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "invitation_id", nullable = false)
+    val invitation: Invitation,
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "user_id", nullable = false)
+    val user: User,
+
+    @Column(name = "text_content", columnDefinition = "TEXT", nullable = false)
+    var textContent: String,
+
+    @OneToMany(mappedBy = "guestBook", cascade = [CascadeType.ALL])
+    val images: MutableList<GuestBookImage> = mutableListOf(),
+
+    @OneToMany(mappedBy = "guestBook", cascade = [CascadeType.ALL])
+    val audios: MutableList<GuestBookAudio> = mutableListOf(),
+
+    @OneToMany(mappedBy = "guestBook", cascade = [CascadeType.ALL])
+    val videos: MutableList<GuestBookVideo> = mutableListOf()
+) : BaseTimeEntity()
+
+@Entity
+@Table(name = "guestbook_images")
+class GuestBookImage(
+    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
+    val id: Long = 0,
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "guestbook_post_id", nullable = false)
+    val guestBook: GuestBook,
+
+    @Column(name = "image_url", nullable = false)
+    val imageUrl: String,
+
+    @Column(name = "display_order", nullable = false)
+    val displayOrder: Int = 0
+)
+
+@Entity
+@Table(name = "guestbook_audios")
+class GuestBookAudio(
+    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
+    val id: Long = 0,
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "guestbook_post_id", nullable = false)
+    val guestBook: GuestBook,
+
+    @Column(name = "audio_url", nullable = false)
+    val audioUrl: String,
+
+    @Column(name = "duration_seconds", nullable = false)
+    val durationSeconds: Int,
+
+    @Column(name = "display_order", nullable = false)
+    val displayOrder: Int = 0
+)
+
+@Entity
+@Table(name = "guestbook_videos")
+class GuestBookVideo(
+    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
+    val id: Long = 0,
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "guestbook_post_id", nullable = false)
+    val guestBook: GuestBook,
+
+    @Column(name = "video_url", nullable = false)
+    val videoUrl: String,
+
+    @Column(name = "thumbnail_url", nullable = false)
+    val thumbnailUrl: String,
+
+
+    @Column(name = "duration_seconds", nullable = false)
+    val durationSeconds: Int,
+
+    @Column(name = "display_order", nullable = false)
+    val displayOrder: Int = 0,
+
+    @OneToMany(mappedBy = "video", cascade = [CascadeType.ALL])
+    val previewThumbnails: MutableList<VideoPreviewThumbnail> = mutableListOf()
+)
+
+
+@Entity
+@Table(name = "video_preview_thumbnails")
+class VideoPreviewThumbnail(
+    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
+    val id: Long = 0,
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "guestbook_video_id", nullable = false)
+    val video: GuestBookVideo,
+
+    @Column(name = "thumbnail_url", nullable = false)
+    val thumbnailUrl: String,
+
+    @Column(name = "time_seconds", nullable = false)
+    val timeSeconds: Double
+)
\ No newline at end of file
diff --git a/backend/src/main/kotlin/com/andlife/InvitationServer/entity/Invitation.kt b/backend/src/main/kotlin/com/andlife/InvitationServer/entity/Invitation.kt
new file mode 100644
index 00000000..e58da36e
--- /dev/null
+++ b/backend/src/main/kotlin/com/andlife/InvitationServer/entity/Invitation.kt
@@ -0,0 +1,61 @@
+package com.andlife.InvitationServer.entity
+
+import com.andlife.InvitationServer.util.StringListConverter
+import jakarta.persistence.Column
+import jakarta.persistence.Convert
+import jakarta.persistence.Entity
+import jakarta.persistence.FetchType
+import jakarta.persistence.GeneratedValue
+import jakarta.persistence.GenerationType
+import jakarta.persistence.Id
+import jakarta.persistence.JoinColumn
+import jakarta.persistence.ManyToOne
+import jakarta.persistence.Table
+import java.time.LocalDate
+import java.time.LocalTime
+
+@Entity
+@Table(name = "invitations")
+class Invitation(
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    val id: Long = 0,
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "host_id", nullable = false)
+    val host: User,
+
+    @Column(nullable = false)
+    var title: String,
+
+    @Column(name = "display_host_name", nullable = false)
+    var displayHostName: String,
+
+    @Convert(converter = StringListConverter::class)
+    @Column(name = "thumbnail_urls")
+    var thumbnailUrls: List<String> = emptyList(),
+
+    @Column(name = "invitation_date", nullable = false)
+    val invitationDate: LocalDate,
+
+    @Column(name = "start_time", nullable = false)
+    val startTime: LocalTime,
+
+    @Column(name = "end_time")
+    val endTime: LocalTime? = null,
+
+    @Column(name = "place_name", nullable = false)
+    var placeName: String,
+
+    @Column(nullable = false)
+    var address: String,
+
+    @Column(nullable = false)
+    val lat: Double,
+
+    @Column(nullable = false)
+    val lng: Double,
+
+    @Column(name = "location_guide")
+    var locationGuide: String? = null
+) : BaseTimeEntity()
\ No newline at end of file
diff --git a/backend/src/main/kotlin/com/andlife/InvitationServer/entity/InvitationCard.kt b/backend/src/main/kotlin/com/andlife/InvitationServer/entity/InvitationCard.kt
new file mode 100644
index 00000000..11c0984b
--- /dev/null
+++ b/backend/src/main/kotlin/com/andlife/InvitationServer/entity/InvitationCard.kt
@@ -0,0 +1,29 @@
+package com.andlife.InvitationServer.entity
+
+import jakarta.persistence.Column
+import jakarta.persistence.Entity
+import jakarta.persistence.FetchType
+import jakarta.persistence.GeneratedValue
+import jakarta.persistence.GenerationType
+import jakarta.persistence.Id
+import jakarta.persistence.JoinColumn
+import jakarta.persistence.OneToOne
+import jakarta.persistence.Table
+
+@Entity
+@Table(name = "invitation_cards")
+class InvitationCard(
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    val id: Long = 0,
+
+    @OneToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "invitation_id", nullable = false)
+    val invitation: Invitation,
+
+    @Column(name = "content_json", columnDefinition = "TEXT")
+    var contentJson: String,
+
+    @Column(name = "background_image_url")
+    var backgroundImageUrl: String? = null
+)
\ No newline at end of file
diff --git a/backend/src/main/kotlin/com/andlife/InvitationServer/entity/InvitationParticipant.kt b/backend/src/main/kotlin/com/andlife/InvitationServer/entity/InvitationParticipant.kt
new file mode 100644
index 00000000..6b3f2cb4
--- /dev/null
+++ b/backend/src/main/kotlin/com/andlife/InvitationServer/entity/InvitationParticipant.kt
@@ -0,0 +1,33 @@
+package com.andlife.InvitationServer.entity
+
+import jakarta.persistence.*
+import org.hibernate.annotations.CreationTimestamp
+import java.time.LocalDateTime
+
+@Entity
+@Table(
+    name = "invitation_participants",
+    uniqueConstraints = [
+        UniqueConstraint(
+            name = "uk_invitation_user",
+            columnNames = ["invitation_id", "user_id"]
+        )
+    ]
+)
+class InvitationParticipant(
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    val id: Long = 0,
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "invitation_id", nullable = false)
+    val invitation: Invitation,
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "user_id", nullable = false)
+    val user: User,
+
+    @CreationTimestamp
+    @Column(name = "joined_at", nullable = false, updatable = false)
+    val joinedAt: LocalDateTime = LocalDateTime.now()
+)
\ No newline at end of file
diff --git a/backend/src/main/kotlin/com/andlife/InvitationServer/entity/ThanksCard.kt b/backend/src/main/kotlin/com/andlife/InvitationServer/entity/ThanksCard.kt
new file mode 100644
index 00000000..fd1ddf4b
--- /dev/null
+++ b/backend/src/main/kotlin/com/andlife/InvitationServer/entity/ThanksCard.kt
@@ -0,0 +1,29 @@
+package com.andlife.InvitationServer.entity
+
+import jakarta.persistence.Column
+import jakarta.persistence.Entity
+import jakarta.persistence.FetchType
+import jakarta.persistence.GeneratedValue
+import jakarta.persistence.GenerationType
+import jakarta.persistence.Id
+import jakarta.persistence.JoinColumn
+import jakarta.persistence.OneToOne
+import jakarta.persistence.Table
+
+@Entity
+@Table(name = "thanks_cards")
+class ThanksCard(
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    val id: Long = 0,
+
+    @OneToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "invitation_id", nullable = false)
+    val invitation: Invitation,
+
+    @Column(name = "content_json", columnDefinition = "TEXT")
+    var contentJson: String,
+
+    @Column(name = "background_image_url")
+    var backgroundImageUrl: String? = null
+): BaseTimeEntity()
\ No newline at end of file
diff --git a/backend/src/main/kotlin/com/andlife/InvitationServer/entity/User.kt b/backend/src/main/kotlin/com/andlife/InvitationServer/entity/User.kt
new file mode 100644
index 00000000..f38955fc
--- /dev/null
+++ b/backend/src/main/kotlin/com/andlife/InvitationServer/entity/User.kt
@@ -0,0 +1,25 @@
+package com.andlife.InvitationServer.entity
+
+import jakarta.persistence.Column
+import jakarta.persistence.Entity
+import jakarta.persistence.GeneratedValue
+import jakarta.persistence.GenerationType
+import jakarta.persistence.Table
+import jakarta.persistence.Id
+
+@Entity
+@Table(name = "users")
+class User(
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    val id: Long,
+
+    @Column(nullable = false, unique = true)
+    val email: String,
+
+    @Column(nullable = false)
+    val name: String,
+
+    @Column(name = "profile_image_url")
+    val profileImageUrl: String? = null,
+): BaseTimeEntity()
\ No newline at end of file
diff --git a/backend/src/main/kotlin/com/andlife/InvitationServer/response/BaseResponse.kt b/backend/src/main/kotlin/com/andlife/InvitationServer/response/BaseResponse.kt
new file mode 100644
index 00000000..ed182c64
--- /dev/null
+++ b/backend/src/main/kotlin/com/andlife/InvitationServer/response/BaseResponse.kt
@@ -0,0 +1,33 @@
+package com.andlife.InvitationServer.response
+
+data class BaseResponse<T>(
+    val code: Int,
+    val data: T?,
+    val message: String?
+) {
+    companion object {
+
+        fun <T> success(
+            data: T? = null,
+            responseCode: ResponseCode = CommonResponseCode.OK
+        ): BaseResponse<T> {
+            return BaseResponse(
+                code = responseCode.httpStatus.value(),
+                data = data,
+                message = responseCode.message
+            )
+        }
+
+        fun error(
+            responseCode: ResponseCode,
+            customMessage: String? = null
+        ): BaseResponse<Nothing> {
+            return BaseResponse(
+                code = responseCode.httpStatus.value(),
+                data = null,
+                message = customMessage ?: responseCode.message
+            )
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/backend/src/main/kotlin/com/andlife/InvitationServer/response/ResponseCode.kt b/backend/src/main/kotlin/com/andlife/InvitationServer/response/ResponseCode.kt
new file mode 100644
index 00000000..760bfe79
--- /dev/null
+++ b/backend/src/main/kotlin/com/andlife/InvitationServer/response/ResponseCode.kt
@@ -0,0 +1,25 @@
+package com.andlife.InvitationServer.response
+
+import org.springframework.http.HttpStatus
+
+interface ResponseCode {
+    val httpStatus: HttpStatus
+    val message: String
+    val name: String
+}
+
+enum class CommonResponseCode(
+    override val httpStatus: HttpStatus,
+    override val message: String
+): ResponseCode {
+    // 2xx 성공
+    OK(HttpStatus.OK, "성공적으로 처리되었습니다."),
+
+    // 4xx 클라이언트 에러
+    UNAUTHORIZED(HttpStatus.UNAUTHORIZED, "인증 정보가 유효하지 않습니다."),
+    NOT_FOUND(HttpStatus.NOT_FOUND, "요청한 정보를 찾을 수 없습니다."),
+    BAD_REQUEST(HttpStatus.BAD_REQUEST, "잘못된 요청입니다."),
+
+    // 5xx 서버 에러
+    INTERNAL_SERVER_ERROR(HttpStatus.INTERNAL_SERVER_ERROR, "서버에 오류가 발생했습니다. 잠시 후 다시 시도해주세요.")
+}
\ No newline at end of file
diff --git a/backend/src/main/kotlin/com/andlife/InvitationServer/response/home/LatestGuestBookResponse.kt b/backend/src/main/kotlin/com/andlife/InvitationServer/response/home/LatestGuestBookResponse.kt
new file mode 100644
index 00000000..cbf6df1d
--- /dev/null
+++ b/backend/src/main/kotlin/com/andlife/InvitationServer/response/home/LatestGuestBookResponse.kt
@@ -0,0 +1,35 @@
+package com.andlife.InvitationServer.response.home
+
+import java.time.LocalDateTime
+
+data class LatestGuestBookResponse(
+    val id: Long,
+    val userName: String,
+    val userProfileUrl: String,
+    val content: String,
+    val createAt: LocalDateTime,
+    val images: List<GuestbookImageResponse> = emptyList(),
+    val audios: List<GuestbookAudioResponse> = emptyList(),
+    val videos: List<GuestbookVideoResponse> = emptyList()
+)
+
+data class GuestbookImageResponse(
+    val id: Long,
+    val imageUrl: String,
+    val displayOrder: Int
+)
+
+data class GuestbookAudioResponse(
+    val id: Long,
+    val audioUrl: String,
+    val durationSeconds: Int,
+    val displayOrder: Int
+)
+
+data class GuestbookVideoResponse(
+    val id: Long,
+    val videoUrl: String,
+    val thumbnailUrl: String,
+    val durationSeconds: Int,
+    val displayOrder: Int
+)
\ No newline at end of file
diff --git a/backend/src/main/kotlin/com/andlife/InvitationServer/response/home/UpcomingInvitationResponse.kt b/backend/src/main/kotlin/com/andlife/InvitationServer/response/home/UpcomingInvitationResponse.kt
new file mode 100644
index 00000000..0b4c017a
--- /dev/null
+++ b/backend/src/main/kotlin/com/andlife/InvitationServer/response/home/UpcomingInvitationResponse.kt
@@ -0,0 +1,12 @@
+package com.andlife.InvitationServer.response.home
+
+import java.time.LocalDateTime
+
+data class UpcomingInvitationResponse(
+    val id: Long,
+    val title: String,
+    val hostName: String,
+    val startTime: LocalDateTime,
+    val thumbnailUrl: String,
+    val dDay: Int
+)
\ No newline at end of file
diff --git a/backend/src/main/kotlin/com/andlife/InvitationServer/util/StringListConverter.kt b/backend/src/main/kotlin/com/andlife/InvitationServer/util/StringListConverter.kt
new file mode 100644
index 00000000..f0e95c2f
--- /dev/null
+++ b/backend/src/main/kotlin/com/andlife/InvitationServer/util/StringListConverter.kt
@@ -0,0 +1,21 @@
+package com.andlife.InvitationServer.util
+
+import jakarta.persistence.AttributeConverter
+import jakarta.persistence.Converter
+
+@Converter
+class StringListConverter : AttributeConverter<List<String>, String> {
+
+    private val splitChar = ","
+
+    // 엔티티의 List를 DB에 넣을 String으로 변환 (List -> "url1,url2")
+    override fun convertToDatabaseColumn(attribute: List<String>?): String? {
+        return attribute?.joinToString(splitChar)
+    }
+
+    // DB에서 가져온 String을 엔티티의 List로 변환 ("url1,url2" -> List)
+    override fun convertToEntityAttribute(dbData: String?): List<String> {
+        return dbData?.split(splitChar)?.filter { it.isNotBlank() } ?: emptyList()
+    }
+
+}
\ No newline at end of file