diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-side.component.html b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-side.component.html
index 0b828c20..d9dd91b3 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-side.component.html
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-side.component.html
@@ -30,7 +30,10 @@
       <ng-template mat-tab-label>
         <mat-icon>device_hub</mat-icon>
       </ng-template>
-      <app-layout-chat-left-sidenav-organization></app-layout-chat-left-sidenav-organization>
+      <app-layout-chat-left-sidenav-organization
+        [selectedUserList]="selectedUserList"
+        (checkUser)="onCheckUser($event)"
+      ></app-layout-chat-left-sidenav-organization>
     </mat-tab>
     <mat-tab>
       <ng-template mat-tab-label>
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-side.component.ts b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-side.component.ts
index dd105a29..9e1ef530 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-side.component.ts
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-side.component.ts
@@ -12,6 +12,12 @@ import { Store, select } from '@ngrx/store';
 
 import * as AppStore from '@app/store';
 import * as ChatStore from '@app/store/messenger/chat';
+import { UserInfo } from '@ucap-webmessenger/protocol-sync';
+import {
+  UserInfoSS,
+  UserInfoF,
+  UserInfoDN
+} from '@ucap-webmessenger/protocol-query';
 
 @Component({
   selector: 'app-layout-messenger-left-side',
@@ -22,6 +28,9 @@ import * as ChatStore from '@app/store/messenger/chat';
 export class LeftSideComponent implements OnInit {
   badgeChatUnReadCount$: Observable<number>;
 
+  /** 조직도에서 부서원 선택 */
+  selectedUserList: (UserInfo | UserInfoSS | UserInfoF | UserInfoDN)[] = [];
+
   constructor(
     private store: Store<any>,
     private dialogService: DialogService,
@@ -57,4 +66,24 @@ export class LeftSideComponent implements OnInit {
       }
     }
   }
+
+  /** 조직도>부서원 :: 리스트의 checkbox 의 이벤트를 받아 선택된 유저리스트를 수집. */
+  onCheckUser(params: {
+    isChecked: boolean;
+    userInfo: UserInfo | UserInfoSS | UserInfoF | UserInfoDN;
+  }) {
+    if (params.isChecked) {
+      if (
+        this.selectedUserList.filter(user => user.seq === params.userInfo.seq)
+          .length === 0 &&
+        params.userInfo
+      ) {
+        this.selectedUserList = [...this.selectedUserList, params.userInfo];
+      }
+    } else {
+      this.selectedUserList = this.selectedUserList.filter(
+        item => item.seq !== params.userInfo.seq
+      );
+    }
+  }
 }
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.html b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.html
index 3c7629cd..04f77885 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.html
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.html
@@ -30,6 +30,13 @@
     </div>
   </div>
   <div *ngIf="!isUserSelect" class="btn-box">
-    (하단버튼영역)
+    <button mat-stroked-button (click)="onClickShowSelectedUserList()">
+      선택<span *ngIf="selectedUserList.length > 0"
+        >({{ selectedUserList.length }})</span
+      >
+    </button>
+    <button mat-stroked-button (click)="onClickAddGroup()">그룹에 추가</button>
+    <button mat-stroked-button (click)="onClickChatOpen()">대화</button>
+    <button mat-stroked-button (click)="onClickConference()">화상회의</button>
   </div>
 </div>
diff --git a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.ts b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.ts
index e40e0ecb..48bd1ee4 100644
--- a/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.ts
+++ b/projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.ts
@@ -23,6 +23,7 @@ import { NGXLogger } from 'ngx-logger';
 
 import * as AppStore from '@app/store';
 import * as QueryStore from '@app/store/messenger/query';
+import * as ChatStore from '@app/store/messenger/chat';
 import { SessionStorageService } from '@ucap-webmessenger/web-storage';
 import { LoginInfo, KEY_LOGIN_INFO } from '@app/types';
 import { take, map, tap, delay } from 'rxjs/operators';
@@ -180,4 +181,21 @@ export class OrganizationComponent implements OnInit, OnDestroy {
   }) {
     this.checkUser.emit(params);
   }
+
+  onClickShowSelectedUserList() {
+    this.logger.debug('onClickShowSelectedUserList', this.selectedUserList);
+  }
+  onClickAddGroup() {
+    this.logger.debug('onClickAddGroup', this.selectedUserList);
+  }
+  onClickChatOpen() {
+    if (!!this.selectedUserList && this.selectedUserList.length > 0) {
+      const seq: number[] = [];
+      this.selectedUserList.map(user => seq.push(user.seq));
+      this.store.dispatch(ChatStore.openRoom({ userSeqList: seq }));
+    }
+  }
+  onClickConference() {
+    this.logger.debug('onClickConference', this.selectedUserList);
+  }
 }