diff --git a/projects/ucap-webmessenger-protocol-file/src/lib/models/down-check.ts b/projects/ucap-webmessenger-protocol-file/src/lib/models/down-check.ts
new file mode 100644
index 00000000..30aa938a
--- /dev/null
+++ b/projects/ucap-webmessenger-protocol-file/src/lib/models/down-check.ts
@@ -0,0 +1,37 @@
+import { LocaleCode } from '@ucap-webmessenger/core';
+import {
+  ProtocolRequest,
+  ProtocolResponse,
+  ProtocolEncoder,
+  PacketBody,
+  PacketBodyValue,
+  ProtocolDecoder,
+  ProtocolMessage
+} from '@ucap-webmessenger/protocol';
+
+export interface DownCheckRequest extends ProtocolRequest {
+  // 파일SEQ
+  seq: number;
+}
+
+export interface DownCheckResponse extends ProtocolResponse {
+  // 파일SEQ
+  seq: number;
+}
+
+export const encodeDownCheck: ProtocolEncoder<DownCheckRequest> = (
+  req: DownCheckRequest
+) => {
+  const bodyList: PacketBody[] = [];
+
+  bodyList.push({ type: PacketBodyValue.Integer, value: req.seq });
+  return bodyList;
+};
+
+export const decodeDownCheck: ProtocolDecoder<DownCheckResponse> = (
+  message: ProtocolMessage
+) => {
+  return {
+    seq: message.bodyList[0]
+  } as DownCheckResponse;
+};
diff --git a/projects/ucap-webmessenger-protocol-file/src/lib/models/info.ts b/projects/ucap-webmessenger-protocol-file/src/lib/models/info.ts
new file mode 100644
index 00000000..0923ec9d
--- /dev/null
+++ b/projects/ucap-webmessenger-protocol-file/src/lib/models/info.ts
@@ -0,0 +1,144 @@
+import {
+  ProtocolRequest,
+  ProtocolResponse,
+  ProtocolEncoder,
+  PacketBody,
+  PacketBodyValue,
+  ProtocolDecoder,
+  ProtocolMessage,
+  BodyStringDivider,
+  ProtocolStream
+} from '@ucap-webmessenger/protocol';
+import { FileType } from '../types/file.type';
+
+export interface InfoRequest extends ProtocolRequest {
+  // 대화방SEQ(s)
+  roomSeq: string;
+  // { 파일타입 } cf) I : 이미지 V: 동영상 F: 파일 "" 빈값이면 모든 타입을 내려줌
+  type: FileType;
+}
+
+export interface FileInfo {
+  // 대화방SEQ
+  roomSeq: string;
+  // 이벤트SEQ
+  eventSeq: number;
+  // 파일SEQ
+  seq: number;
+  // 송신자SEQ
+  senderSeq: number;
+  // 파일타입
+  type: FileType;
+  // 파일이름
+  name: string;
+  // 파일URL
+  url: string;
+  // 파일크기(byte)
+  size: number;
+  // 전송일시
+  sendDate: string;
+  // 수신완료자수
+  receivedUserCount: number;
+  // 수신자수
+  receiverCount: number;
+}
+
+export interface InfoData extends ProtocolStream {
+  // { 대화방파일정보 }...
+  fileInfos: FileInfo[];
+}
+
+export interface FileDownloadInfo {
+  // 대화방SEQ
+  roomSeq: string;
+  // 파일SEQ
+  seq: number;
+  // 사용자SEQ
+  userSeq: number;
+  // 사용자명
+  userName: string;
+  // 다운로드일시
+  downloadDate: string;
+  // DownYN
+  isDownload: boolean;
+}
+
+export interface InfoCheckData extends ProtocolStream {
+  // { 파일다운로드정보 }...
+  fileDownloadInfos: FileDownloadInfo[];
+}
+
+export interface InfoResponse extends ProtocolResponse {
+  // 대화방SEQ(s)
+  roomSeq: string;
+  // { 파일타입 } cf) I : 이미지 V: 동영상 F: 파일 "" 빈값이면 모든 타입을 내려줌
+  type: FileType;
+}
+
+export const encodeInfo: ProtocolEncoder<InfoRequest> = (req: InfoRequest) => {
+  const bodyList: PacketBody[] = [];
+
+  bodyList.push(
+    { type: PacketBodyValue.String, value: req.roomSeq },
+    { type: PacketBodyValue.String, value: req.type }
+  );
+  return bodyList;
+};
+
+export const decodeInfoData: ProtocolDecoder<InfoData> = (
+  message: ProtocolMessage
+) => {
+  const fileInfos: FileInfo[] = [];
+  message.bodyList.forEach(fileInfo => {
+    const info = fileInfo.split(BodyStringDivider);
+    let i = 0;
+    fileInfos.push({
+      roomSeq: info[i],
+      eventSeq: Number(info[i++]),
+      seq: Number(info[i++]),
+      senderSeq: Number(info[i++]),
+      type: info[i++] as FileType,
+      name: info[i++],
+      url: info[i++],
+      size: info[i++],
+      sendDate: info[i++],
+      receivedUserCount: Number(info[i++]),
+      receiverCount: Number(info[i++])
+    });
+  });
+
+  return {
+    fileInfos
+  } as InfoData;
+};
+
+export const decodeInfoCheckData: ProtocolDecoder<InfoCheckData> = (
+  message: ProtocolMessage
+) => {
+  const fileDownloadInfos: FileDownloadInfo[] = [];
+  message.bodyList.forEach(fileInfo => {
+    const info = fileInfo.split(BodyStringDivider);
+    let i = 0;
+    fileDownloadInfos.push({
+      roomSeq: info[i],
+      seq: Number(info[i++]),
+      userSeq: Number(info[i++]),
+      userName: info[i++],
+      downloadDate: info[i++],
+      isDownload: info[i++] === 'Y' ? true : false
+    });
+  });
+
+  return {
+    fileDownloadInfos
+  } as InfoCheckData;
+};
+
+export const decodeInfo: ProtocolDecoder<InfoResponse> = (
+  message: ProtocolMessage
+) => {
+  return {
+    roomSeq: message.bodyList[0],
+    type: message.bodyList[1] as FileType
+  } as InfoResponse;
+};
diff --git a/projects/ucap-webmessenger-protocol-file/src/lib/services/file-protocol.service.ts b/projects/ucap-webmessenger-protocol-file/src/lib/services/file-protocol.service.ts
index 88b90029..a0c277eb 100644
--- a/projects/ucap-webmessenger-protocol-file/src/lib/services/file-protocol.service.ts
+++ b/projects/ucap-webmessenger-protocol-file/src/lib/services/file-protocol.service.ts
@@ -1,8 +1,79 @@
 import { Injectable } from '@angular/core';
 
+import { Observable } from 'rxjs';
+import { map, takeWhile, take } from 'rxjs/operators';
+
+import { ProtocolService } from '@ucap-webmessenger/protocol';
+import {
+  SSVC_TYPE_FILE_INFO_REQ,
+  SVC_TYPE_FILE,
+  SSVC_TYPE_FILE_INFO_RES,
+  SSVC_TYPE_FILE_INFO_DATA,
+  SSVC_TYPE_FILE_INFO_CHECK_DATA,
+  SSVC_TYPE_FILE_DOWN_CHECK_REQ
+} from '../types/service';
+import {
+  InfoRequest,
+  InfoResponse,
+  encodeInfo,
+  decodeInfo,
+  InfoData,
+  InfoCheckData,
+  decodeInfoData,
+  decodeInfoCheckData
+} from '../models/info';
+import {
+  DownCheckRequest,
+  DownCheckResponse,
+  encodeDownCheck,
+  decodeDownCheck
+} from '../models/down-check';
 @Injectable({
   providedIn: 'root'
 })
 export class FileProtocolService {
-  constructor() {}
+  constructor(private protocolService: ProtocolService) {}
+
+  public info(
+    req: InfoRequest
+  ): Observable<InfoResponse | InfoData | InfoCheckData> {
+    return this.protocolService
+      .call(SVC_TYPE_FILE, SSVC_TYPE_FILE_INFO_REQ, ...encodeInfo(req))
+      .pipe(
+        takeWhile(res => SSVC_TYPE_FILE_INFO_RES !== res.subServiceType, true),
+        map(res => {
+          if (SSVC_TYPE_FILE_INFO_DATA === res.subServiceType) {
+            return {
+              ...decodeInfoData(res),
+              Type: SSVC_TYPE_FILE_INFO_DATA
+            };
+          } else if (SSVC_TYPE_FILE_INFO_CHECK_DATA === res.subServiceType) {
+            return {
+              ...decodeInfoCheckData(res),
+              Type: SSVC_TYPE_FILE_INFO_CHECK_DATA
+            };
+          }
+
+          return {
+            ...decodeInfo(res),
+            Type: SSVC_TYPE_FILE_INFO_RES
+          };
+        })
+      );
+  }
+
+  public downCheck(req: DownCheckRequest): Observable<DownCheckResponse> {
+    return this.protocolService
+      .call(
+        SVC_TYPE_FILE,
+        SSVC_TYPE_FILE_DOWN_CHECK_REQ,
+        ...encodeDownCheck(req)
+      )
+      .pipe(
+        take(1),
+        map(res => {
+          return decodeDownCheck(res);
+        })
+      );
+  }
 }
diff --git a/projects/ucap-webmessenger-protocol-file/src/lib/types/file.type.ts b/projects/ucap-webmessenger-protocol-file/src/lib/types/file.type.ts
new file mode 100644
index 00000000..9d244882
--- /dev/null
+++ b/projects/ucap-webmessenger-protocol-file/src/lib/types/file.type.ts
@@ -0,0 +1,10 @@
+export enum FileType {
+  // I : 이미지
+  Image = 'I',
+  // V : 동영상
+  Video = 'V',
+  // F : 파일
+  File = 'F',
+  // "" 빈값이면 모든 타입을 내려줌
+  All = ''
+}
diff --git a/projects/ucap-webmessenger-protocol-file/src/lib/types/service.ts b/projects/ucap-webmessenger-protocol-file/src/lib/types/service.ts
new file mode 100644
index 00000000..10afeb2e
--- /dev/null
+++ b/projects/ucap-webmessenger-protocol-file/src/lib/types/service.ts
@@ -0,0 +1,7 @@
+export const SVC_TYPE_FILE = 53; // File
+export const SSVC_TYPE_FILE_INFO_REQ = 1; // File 정보 전송 요청
+export const SSVC_TYPE_FILE_INFO_DATA = 2; // File 정보 Data
+export const SSVC_TYPE_FILE_INFO_CHECK_DATA = 3; // File 다운로드 체크 Data
+export const SSVC_TYPE_FILE_INFO_RES = 4; // File 정보 전송 응답
+export const SSVC_TYPE_FILE_DOWN_CHECK_REQ = 11; // File 다운로드 완료 요청
+export const SSVC_TYPE_FILE_DOWN_CHECK_RES = 12; // File 다운로드 완료 응답
diff --git a/projects/ucap-webmessenger-protocol-file/src/public-api.ts b/projects/ucap-webmessenger-protocol-file/src/public-api.ts
index 1b7dc0be..b8b41e1b 100644
--- a/projects/ucap-webmessenger-protocol-file/src/public-api.ts
+++ b/projects/ucap-webmessenger-protocol-file/src/public-api.ts
@@ -2,6 +2,12 @@
  * Public API Surface of ucap-webmessenger-protocol-file
  */
 
+export * from './lib/models/down-check';
+export * from './lib/models/info';
+
 export * from './lib/services/file-protocol.service';
 
+export * from './lib/types/file.type';
+export * from './lib/types/service';
+
 export * from './lib/ucap-file-protocol.module';