diff --git a/projects/ucap-webmessenger-protocol-service/src/lib/models/password-set.ts b/projects/ucap-webmessenger-protocol-service/src/lib/models/password-set.ts
new file mode 100644
index 00000000..a4d04941
--- /dev/null
+++ b/projects/ucap-webmessenger-protocol-service/src/lib/models/password-set.ts
@@ -0,0 +1,54 @@
+import {
+  ProtocolRequest,
+  ProtocolResponse,
+  ProtocolEncoder,
+  PacketBody,
+  PacketBodyValue,
+  ProtocolDecoder,
+  ProtocolMessage
+} from '@ucap-webmessenger/protocol';
+
+export interface UserPasswordSetRequest extends ProtocolRequest {
+  // LoginID(s)
+  loginId: string;
+  // LoginPW
+  oldLoginPw: string;
+  // NewPW
+  newLoginPw: string;
+  // 기관코드(s)
+  companyCode: string;
+}
+
+export interface UserPasswordSetResponse extends ProtocolResponse {
+  // LoginID(s)
+  loginId: string;
+  // LoginPW
+  oldLoginPw: string;
+  // NewPW
+  newLoginPw: string;
+  // 기관코드(s)
+  companyCode: string;
+}
+
+export const encodeUserPasswordSet: ProtocolEncoder<UserPasswordSetRequest> = (
+  req: UserPasswordSetRequest
+) => {
+  const bodyList: PacketBody[] = [];
+
+  bodyList.push({ type: PacketBodyValue.String, value: req.loginId });
+  bodyList.push({ type: PacketBodyValue.String, value: req.oldLoginPw });
+  bodyList.push({ type: PacketBodyValue.String, value: req.newLoginPw });
+  bodyList.push({ type: PacketBodyValue.String, value: req.companyCode });
+  return bodyList;
+};
+
+export const decodeUserPasswordSet: ProtocolDecoder<UserPasswordSetResponse> = (
+  message: ProtocolMessage
+) => {
+  return {
+    loginId: message.bodyList[0],
+    oldLoginPw: message.bodyList[1],
+    newLoginPw: message.bodyList[2],
+    companyCode: message.bodyList[3]
+  } as UserPasswordSetResponse;
+};
diff --git a/projects/ucap-webmessenger-protocol-service/src/lib/services/service-protocol.service.ts b/projects/ucap-webmessenger-protocol-service/src/lib/services/service-protocol.service.ts
index d3b26ac2..f87b9bfa 100644
--- a/projects/ucap-webmessenger-protocol-service/src/lib/services/service-protocol.service.ts
+++ b/projects/ucap-webmessenger-protocol-service/src/lib/services/service-protocol.service.ts
@@ -1,8 +1,36 @@
 import { Injectable } from '@angular/core';
 
+import { Observable } from 'rxjs';
+import { map, take, takeWhile } from 'rxjs/operators';
+import {
+  UserPasswordSetRequest,
+  UserPasswordSetResponse,
+  encodeUserPasswordSet,
+  decodeUserPasswordSet
+} from '../models/password-set';
+import { ProtocolService } from '@ucap-webmessenger/protocol';
+import { SVC_TYPE_SERVICE, SSVC_TYPE_USER_PW_SET_REQ } from '../types/service';
+
 @Injectable({
   providedIn: 'root'
 })
 export class ServiceProtocolService {
-  constructor() {}
+  constructor(private protocolService: ProtocolService) {}
+
+  public userPasswordSet(
+    req: UserPasswordSetRequest
+  ): Observable<UserPasswordSetResponse> {
+    return this.protocolService
+      .call(
+        SVC_TYPE_SERVICE,
+        SSVC_TYPE_USER_PW_SET_REQ,
+        ...encodeUserPasswordSet(req)
+      )
+      .pipe(
+        take(1),
+        map(res => {
+          return decodeUserPasswordSet(res);
+        })
+      );
+  }
 }
diff --git a/projects/ucap-webmessenger-protocol-service/src/lib/types/service.ts b/projects/ucap-webmessenger-protocol-service/src/lib/types/service.ts
new file mode 100644
index 00000000..edec55b9
--- /dev/null
+++ b/projects/ucap-webmessenger-protocol-service/src/lib/types/service.ts
@@ -0,0 +1,25 @@
+export const SVC_TYPE_SERVICE = 92;
+export const SSVC_TYPE_SMART_PUSH_SEND = 1; // SmartPush  발신 발신
+export const SSVC_TYPE_SMART_PUSH_RECV = 2; // SmartPush  수신 수신
+export const SSVC_TYPE_SMART_PUSH_RECV_OK = 3; // SmartPush  수신 확인
+export const SSVC_TYPE_EXTERN_REQ_SEND = 4; // 외부프로그램요청
+export const SSVC_TYPE_EXTERN_REQ_RECV = 5; // 외부프로그램응답
+export const SSVC_TYPE_USER_PW_SET_REQ = 6; // PW변경 요청
+export const SSVC_TYPE_USER_PW_SET_RES = 7; // PW변경 응답
+export const SSVC_TYPE_MSG_REQ_SEND = 11; // 메시지 전달 발신
+export const SSVC_TYPE_MSG_REQ_RECV = 12; // 메시지 전달 수신
+export const SSVC_TYPE_FMC_PUSH_REQ = 21; // FMC PUSH 요청
+export const SSVC_TYPE_FMC_PUSH_NOTI = 22; // FMC PUSH 알림(PC / Web 용)
+export const SSVC_TYPE_FMC_PUSH_RES = 23; // FMC PUSH 응답
+export const SSVC_TYPE_BUDDY_IMPORT_REQ = 31; // 친구 목록 IMPORT 요청
+export const SSVC_TYPE_BUDDY_IMPORT_RES = 32; // 친구 목록 IMPORT 응답
+export const SSVC_TYPE_BUDDY_IMPORT_COMPLETE_REQ = 33; // 친구 목록 IMPORT 완료 요청
+export const SSVC_TYPE_BUDDY_IMPORT_COMPLETE_NOTI = 34; // 친구 목록 IMPORT 완료 알림
+export const SSVC_TYPE_BUDDY_IMPORT_COMPLETE_RES = 35; // 친구 목록 IMPORT 완료 응답
+export const SSVC_TYPE_BUDDY_EXPORT_REQ = 36; // 친구 목록 EXPORT 요청
+export const SSVC_TYPE_BUDDY_EXPORT_GROUP_DATA = 37; // 친구 목록 EXPORT 그룹 정보
+export const SSVC_TYPE_BUDDY_EXPORT_BUDDY_DATA = 38; // 친구 목록 EXPORT 친구 정보
+export const SSVC_TYPE_BUDDY_EXPORT_RES = 39; // 친구 목록 EXPORT 응답
+export const SSVC_TYPE_BUDDY_INIT_REQ = 40; // 친구 초기화 요청
+export const SSVC_TYPE_BUDDY_INIT_NOTI = 41; // 친구 초기화 알림
+export const SSVC_TYPE_BUDDY_INIT_RES = 42; // 친구 초기화 응답