diff --git a/src/main/kotlin/dev/usbharu/hideout/controller/mastodon/MastodonMediaApiController.kt b/src/main/kotlin/dev/usbharu/hideout/controller/mastodon/MastodonMediaApiController.kt
index e1951898..f2d19aab 100644
--- a/src/main/kotlin/dev/usbharu/hideout/controller/mastodon/MastodonMediaApiController.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/controller/mastodon/MastodonMediaApiController.kt
@@ -2,18 +2,29 @@ package dev.usbharu.hideout.controller.mastodon
 
 import dev.usbharu.hideout.controller.mastodon.generated.MediaApi
 import dev.usbharu.hideout.domain.mastodon.model.generated.MediaAttachment
+import dev.usbharu.hideout.domain.model.hideout.form.Media
+import dev.usbharu.hideout.service.api.mastodon.MediaApiService
 import org.springframework.http.ResponseEntity
 import org.springframework.stereotype.Controller
 import org.springframework.web.multipart.MultipartFile
 
 @Controller
-class MastodonMediaApiController : MediaApi {
+class MastodonMediaApiController(private val mediaApiService: MediaApiService) : MediaApi {
     override fun apiV1MediaPost(
         file: MultipartFile,
         thumbnail: MultipartFile?,
         description: String?,
         focus: String?
     ): ResponseEntity<MediaAttachment> {
-
+        return ResponseEntity.ok(
+            mediaApiService.postMedia(
+                Media(
+                    file,
+                    thumbnail,
+                    description,
+                    focus
+                )
+            )
+        )
     }
 }
diff --git a/src/main/kotlin/dev/usbharu/hideout/domain/model/MediaSave.kt b/src/main/kotlin/dev/usbharu/hideout/domain/model/MediaSave.kt
new file mode 100644
index 00000000..f4086904
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/domain/model/MediaSave.kt
@@ -0,0 +1,10 @@
+package dev.usbharu.hideout.domain.model
+
+import java.io.InputStream
+
+data class MediaSave(
+    val name: String,
+    val prefix: String,
+    val fileInputStream: InputStream,
+    val thumbnailInputStream: InputStream
+)
diff --git a/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/entity/Media.kt b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/entity/Media.kt
new file mode 100644
index 00000000..6f5f0e78
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/entity/Media.kt
@@ -0,0 +1,13 @@
+package dev.usbharu.hideout.domain.model.hideout.entity
+
+import dev.usbharu.hideout.service.media.FileTypeDeterminationService
+
+data class Media(
+    val id: Long,
+    val name: String,
+    val url: String,
+    val remoteUrl: String?,
+    val thumbnailUrl: String?,
+    val type: FileTypeDeterminationService.FileType,
+    val blurHash: String?
+)
diff --git a/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/form/Media.kt b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/form/Media.kt
new file mode 100644
index 00000000..978eaa56
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/domain/model/hideout/form/Media.kt
@@ -0,0 +1,10 @@
+package dev.usbharu.hideout.domain.model.hideout.form
+
+import org.springframework.web.multipart.MultipartFile
+
+data class Media(
+    val file: MultipartFile,
+    val thumbnail: MultipartFile?,
+    val description: String?,
+    val focus: String?
+)
diff --git a/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaException.kt b/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaException.kt
new file mode 100644
index 00000000..922a42a8
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaException.kt
@@ -0,0 +1,14 @@
+package dev.usbharu.hideout.exception.media
+
+abstract class MediaException : RuntimeException {
+    constructor() : super()
+    constructor(message: String?) : super(message)
+    constructor(message: String?, cause: Throwable?) : super(message, cause)
+    constructor(cause: Throwable?) : super(cause)
+    constructor(message: String?, cause: Throwable?, enableSuppression: Boolean, writableStackTrace: Boolean) : super(
+        message,
+        cause,
+        enableSuppression,
+        writableStackTrace
+    )
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaUploadException.kt b/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaUploadException.kt
new file mode 100644
index 00000000..36afc8b7
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/exception/media/MediaUploadException.kt
@@ -0,0 +1,14 @@
+package dev.usbharu.hideout.exception.media
+
+open class MediaUploadException : MediaException {
+    constructor() : super()
+    constructor(message: String?) : super(message)
+    constructor(message: String?, cause: Throwable?) : super(message, cause)
+    constructor(cause: Throwable?) : super(cause)
+    constructor(message: String?, cause: Throwable?, enableSuppression: Boolean, writableStackTrace: Boolean) : super(
+        message,
+        cause,
+        enableSuppression,
+        writableStackTrace
+    )
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/repository/MediaRepository.kt b/src/main/kotlin/dev/usbharu/hideout/repository/MediaRepository.kt
new file mode 100644
index 00000000..be55bb86
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/repository/MediaRepository.kt
@@ -0,0 +1,10 @@
+package dev.usbharu.hideout.repository
+
+import dev.usbharu.hideout.domain.model.hideout.entity.Media
+
+interface MediaRepository {
+    suspend fun generateId(): Long
+    suspend fun save(media: Media): Media
+    suspend fun findById(id: Long): Media
+    suspend fun delete(id: Long)
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/repository/MediaRepositoryImpl.kt b/src/main/kotlin/dev/usbharu/hideout/repository/MediaRepositoryImpl.kt
new file mode 100644
index 00000000..ba5724d0
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/repository/MediaRepositoryImpl.kt
@@ -0,0 +1,80 @@
+package dev.usbharu.hideout.repository
+
+
+import dev.usbharu.hideout.exception.FailedToGetResourcesException
+import dev.usbharu.hideout.service.core.IdGenerateService
+import dev.usbharu.hideout.service.media.FileTypeDeterminationService
+import dev.usbharu.hideout.util.singleOr
+import org.jetbrains.exposed.sql.*
+import org.jetbrains.exposed.sql.SqlExpressionBuilder.eq
+import org.springframework.stereotype.Repository
+import dev.usbharu.hideout.domain.model.hideout.entity.Media as EntityMedia
+
+@Repository
+class MediaRepositoryImpl(private val idGenerateService: IdGenerateService) : MediaRepository {
+    override suspend fun generateId(): Long = idGenerateService.generateId()
+
+    override suspend fun save(media: EntityMedia): EntityMedia {
+        if (Media.select {
+                Media.id eq media.id
+            }.singleOrNull() != null) {
+            Media.update({ Media.id eq media.id }) {
+                it[Media.name] = media.name
+                it[Media.url] = media.url
+                it[Media.remoteUrl] = media.remoteUrl
+                it[Media.thumbnailUrl] = media.thumbnailUrl
+                it[Media.type] = media.type.ordinal
+                it[Media.blurhash] = media.blurHash
+            }
+        } else {
+            Media.insert {
+                it[Media.id] = media.id
+                it[Media.name] = media.name
+                it[Media.url] = media.url
+                it[Media.remoteUrl] = media.remoteUrl
+                it[Media.thumbnailUrl] = media.thumbnailUrl
+                it[Media.type] = media.type.ordinal
+                it[Media.blurhash] = media.blurHash
+            }
+        }
+        return media
+    }
+
+    override suspend fun findById(id: Long): EntityMedia {
+        return Media
+            .select {
+                Media.id eq id
+            }
+            .singleOr {
+                FailedToGetResourcesException("id: $id was not found.")
+            }.toMedia()
+    }
+
+    override suspend fun delete(id: Long) {
+        Media.deleteWhere {
+            Media.id eq id
+        }
+    }
+
+    fun ResultRow.toMedia(): EntityMedia {
+        return EntityMedia(
+            this[Media.id],
+            this[Media.name],
+            this[Media.url],
+            this[Media.remoteUrl],
+            this[Media.thumbnailUrl],
+            FileTypeDeterminationService.FileType.values().first { it.ordinal == this[Media.type] },
+            this[Media.blurhash],
+        )
+    }
+}
+
+object Media : Table("media") {
+    val id = long("id")
+    val name = varchar("name", 255)
+    val url = varchar("url", 255)
+    val remoteUrl = varchar("remote_url", 255).nullable()
+    val thumbnailUrl = varchar("thumbnail_url", 255).nullable()
+    val type = integer("type")
+    val blurhash = varchar("blurhash", 255).nullable()
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/api/mastodon/MediaApiService.kt b/src/main/kotlin/dev/usbharu/hideout/service/api/mastodon/MediaApiService.kt
new file mode 100644
index 00000000..8b1da1b9
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/api/mastodon/MediaApiService.kt
@@ -0,0 +1,10 @@
+package dev.usbharu.hideout.service.api.mastodon
+
+import dev.usbharu.hideout.domain.mastodon.model.generated.MediaAttachment
+import dev.usbharu.hideout.domain.model.hideout.form.Media
+import org.springframework.stereotype.Service
+
+@Service
+interface MediaApiService {
+    suspend fun postMedia(media: Media): MediaAttachment
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/api/mastodon/MediaApiServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/service/api/mastodon/MediaApiServiceImpl.kt
new file mode 100644
index 00000000..230e749e
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/api/mastodon/MediaApiServiceImpl.kt
@@ -0,0 +1,11 @@
+package dev.usbharu.hideout.service.api.mastodon
+
+import dev.usbharu.hideout.domain.mastodon.model.generated.MediaAttachment
+import dev.usbharu.hideout.domain.model.hideout.form.Media
+import dev.usbharu.hideout.service.media.MediaService
+
+class MediaApiServiceImpl(private val mediaService: MediaService) : MediaApiService {
+    override suspend fun postMedia(media: Media): MediaAttachment {
+        mediaService.uploadLocalMedia(media)
+    }
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/FileTypeDeterminationService.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/FileTypeDeterminationService.kt
new file mode 100644
index 00000000..c30762de
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/FileTypeDeterminationService.kt
@@ -0,0 +1,12 @@
+package dev.usbharu.hideout.service.media
+
+interface FileTypeDeterminationService {
+    fun fileType(byteArray: ByteArray, filename: String, contentType: String?): FileType
+
+    enum class FileType {
+        Image,
+        Video,
+        Audio,
+        Unknown
+    }
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/FileTypeDeterminationServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/FileTypeDeterminationServiceImpl.kt
new file mode 100644
index 00000000..5ab2df2e
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/FileTypeDeterminationServiceImpl.kt
@@ -0,0 +1,26 @@
+package dev.usbharu.hideout.service.media
+
+import org.springframework.stereotype.Component
+
+@Component
+class FileTypeDeterminationServiceImpl : FileTypeDeterminationService {
+    override fun fileType(
+        byteArray: ByteArray,
+        filename: String,
+        contentType: String?
+    ): FileTypeDeterminationService.FileType {
+        if (contentType == null) {
+            return FileTypeDeterminationService.FileType.Unknown
+        }
+        if (contentType.startsWith("image")) {
+            return FileTypeDeterminationService.FileType.Image
+        }
+        if (contentType.startsWith("video")) {
+            return FileTypeDeterminationService.FileType.Video
+        }
+        if (contentType.startsWith("audio")) {
+            return FileTypeDeterminationService.FileType.Audio
+        }
+        return FileTypeDeterminationService.FileType.Unknown
+    }
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/MediaBlurhashService.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/MediaBlurhashService.kt
new file mode 100644
index 00000000..490a2ffe
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/MediaBlurhashService.kt
@@ -0,0 +1,7 @@
+package dev.usbharu.hideout.service.media
+
+import java.awt.image.BufferedImage
+
+interface MediaBlurhashService {
+    fun generateBlurhash(bufferedImage: BufferedImage): String
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/MediaDataStore.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/MediaDataStore.kt
new file mode 100644
index 00000000..bb452f0d
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/MediaDataStore.kt
@@ -0,0 +1,8 @@
+package dev.usbharu.hideout.service.media
+
+import dev.usbharu.hideout.domain.model.MediaSave
+
+interface MediaDataStore {
+    suspend fun save(dataMediaSave: MediaSave)
+    suspend fun delete(id: Long)
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/MediaService.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/MediaService.kt
new file mode 100644
index 00000000..47446a3b
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/MediaService.kt
@@ -0,0 +1,7 @@
+package dev.usbharu.hideout.service.media
+
+import dev.usbharu.hideout.domain.model.hideout.form.Media
+
+interface MediaService {
+    suspend fun uploadLocalMedia(media: Media): SavedMedia
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/MediaServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/MediaServiceImpl.kt
new file mode 100644
index 00000000..799e0dc4
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/MediaServiceImpl.kt
@@ -0,0 +1,56 @@
+package dev.usbharu.hideout.service.media
+
+import dev.usbharu.hideout.domain.model.MediaSave
+import dev.usbharu.hideout.domain.model.hideout.form.Media
+import dev.usbharu.hideout.exception.media.MediaException
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import org.springframework.stereotype.Service
+import javax.imageio.ImageIO
+
+@Service
+class MediaServiceImpl(
+    private val mediaDataStore: MediaDataStore,
+    private val fileTypeDeterminationService: FileTypeDeterminationService,
+    private val mediaBlurhashService: MediaBlurhashService
+) : MediaService {
+    override suspend fun uploadLocalMedia(media: Media): SavedMedia {
+        if (media.file.size == 0L) {
+            return FaildSavedMedia(
+                "File size is 0.",
+                "Cannot upload a file with a file size of 0."
+            )
+        }
+
+        val fileType = fileTypeDeterminationService.fileType(media.file.bytes, media.file.name, media.file.contentType)
+        if (fileType != FileTypeDeterminationService.FileType.Image) {
+            return FaildSavedMedia("Unsupported file type.", "FileType: $fileType is not supported.")
+        }
+
+        try {
+            mediaDataStore.save(
+                MediaSave(
+                    media.file.name,
+                    "",
+                    media.file.inputStream,
+                    media.thumbnail.inputStream
+                )
+            )
+        } catch (e: MediaException) {
+            return FaildSavedMedia(
+                "Faild to upload.",
+                e.localizedMessage,
+                e
+            )
+        }
+
+        val withContext = withContext(Dispatchers.IO) {
+            mediaBlurhashService.generateBlurhash(ImageIO.read(media.file.inputStream))
+        }
+
+        return SuccessSavedMedia(
+            media.file.name, "", "",
+            withContext
+        )
+    }
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/service/media/SavedMedia.kt b/src/main/kotlin/dev/usbharu/hideout/service/media/SavedMedia.kt
new file mode 100644
index 00000000..ffd94ef8
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/service/media/SavedMedia.kt
@@ -0,0 +1,18 @@
+package dev.usbharu.hideout.service.media
+
+sealed class SavedMedia(val success: Boolean)
+
+class SuccessSavedMedia(
+    val name: String,
+    val url: String,
+    val thumbnailUrl: String,
+    val blurhash: String
+) :
+    SavedMedia(true)
+
+
+class FaildSavedMedia(
+    val reason: String,
+    val description: String,
+    val trace: Throwable? = null
+) : SavedMedia(false)