diff --git a/src/main/kotlin/com/yapp/web2/domain/bookmark/entity/Bookmark.kt b/src/main/kotlin/com/yapp/web2/domain/bookmark/entity/Bookmark.kt
index 1f2c2270..e0918ad6 100644
--- a/src/main/kotlin/com/yapp/web2/domain/bookmark/entity/Bookmark.kt
+++ b/src/main/kotlin/com/yapp/web2/domain/bookmark/entity/Bookmark.kt
@@ -85,6 +85,8 @@ class Bookmark(
 
     var remindList = mutableListOf<Remind>()
 
+    var shared: Boolean = false
+
     fun restore(): Bookmark {
         this.deleted = false
         this.deleteTime = null
@@ -96,6 +98,10 @@ class Bookmark(
         this.description = description
     }
 
+    fun changeSharedTrue() {
+        this.shared = true
+    }
+
     fun deletedByFolder() {
         this.folderId = null
         this.folderEmoji = ""
diff --git a/src/main/kotlin/com/yapp/web2/domain/bookmark/repository/BookmarkRepository.kt b/src/main/kotlin/com/yapp/web2/domain/bookmark/repository/BookmarkRepository.kt
index 6654319b..59f76ad5 100644
--- a/src/main/kotlin/com/yapp/web2/domain/bookmark/repository/BookmarkRepository.kt
+++ b/src/main/kotlin/com/yapp/web2/domain/bookmark/repository/BookmarkRepository.kt
@@ -14,6 +14,8 @@ interface BookmarkRepository : MongoRepository<Bookmark, String> {
 
     fun findAllByFolderId(folderId: Long): List<Bookmark>
 
+    fun findAllByFolderId(folderIdList: List<Long?>): List<Bookmark>
+
     fun findAllByFolderIdAndDeleteTimeIsNullAndRemindTimeIsNotNull(folderId: Long, pageable: Pageable): Page<Bookmark>
 
     fun findAllByFolderIdAndDeletedIsFalse(folderId: Long, pageable: Pageable): Page<Bookmark>
diff --git a/src/main/kotlin/com/yapp/web2/domain/folder/controller/FolderController.kt b/src/main/kotlin/com/yapp/web2/domain/folder/controller/FolderController.kt
index d5180a53..eec76d4c 100644
--- a/src/main/kotlin/com/yapp/web2/domain/folder/controller/FolderController.kt
+++ b/src/main/kotlin/com/yapp/web2/domain/folder/controller/FolderController.kt
@@ -113,12 +113,18 @@ class FolderController(
     }
 
     // TODO: 2022/06/22 유저 정보 확인
-    @ApiOperation(value = "암호화된 폴더 ID 조회 API")
+    @ApiOperation(value = "폴더 토큰 발급 API")
     @GetMapping("encrypt/{folderId}")
     fun getEncryptFolderId(@PathVariable folderId: Long): ResponseEntity<FolderTokenDto> {
         return ResponseEntity.status(HttpStatus.OK).body(folderService.encryptFolderId(folderId))
     }
 
+    @ApiOperation(value = "초대를 위한 폴더 토큰 발급 API")
+    @GetMapping("invite/{folderId}")
+    fun getFolderInvitationToken(@PathVariable folderId: Long): ResponseEntity<FolderTokenDto> {
+        return ResponseEntity.status(HttpStatus.OK).body(folderService.createFolderInvitationToken(folderId))
+    }
+
     @ApiOperation(value = "보관함에 속한 유저 리스트 조회 API")
     @GetMapping("belong/{folderId}")
     fun getAccountList(@PathVariable @ApiParam(value = "폴더 ID", example = "2", required = true) folderId: Long):
diff --git a/src/main/kotlin/com/yapp/web2/domain/folder/entity/Folder.kt b/src/main/kotlin/com/yapp/web2/domain/folder/entity/Folder.kt
index 14d127f9..51576003 100644
--- a/src/main/kotlin/com/yapp/web2/domain/folder/entity/Folder.kt
+++ b/src/main/kotlin/com/yapp/web2/domain/folder/entity/Folder.kt
@@ -175,9 +175,12 @@ class Folder(
         this.bookmarkCount += count
     }
 
-    fun setRootFolder(folder: Folder) {
-        folder.rootFolderId?.let {
-            this.rootFolderId = it
-        } ?: let { this.rootFolderId = folder.id }
+    fun folderToShared(rootFolderId: Long) {
+        this.rootFolderId = rootFolderId
+    }
+
+    fun isRootFolder(): Boolean {
+        if(parentFolder == null) return true
+        return false
     }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/com/yapp/web2/domain/folder/service/FolderService.kt b/src/main/kotlin/com/yapp/web2/domain/folder/service/FolderService.kt
index 8073c423..042e721a 100644
--- a/src/main/kotlin/com/yapp/web2/domain/folder/service/FolderService.kt
+++ b/src/main/kotlin/com/yapp/web2/domain/folder/service/FolderService.kt
@@ -324,6 +324,42 @@ class FolderService(
         return childList
     }
 
+    fun createFolderInvitationToken(rootFolderId: Long): FolderTokenDto {
+        //그냥 재귀를 돌면서 Folder 리스트들을 다 받고, 그 후에 폴더들에 rootFolder 추가, 북마크 shared 변경 하면 되지 않을까? 굳이 재귀?
+        val folder = folderRepository.findFolderById(rootFolderId) ?: throw FolderNotFoundException()
+        if(!folder.isRootFolder()) throw RuntimeException("보관함이 아닙니다! 공유를 할 수 없습니다.")
+
+        // 하위 폴더들 모두 rootFolderId 추가해주기
+        val sharedFolderIdList = folderToShared(folder, rootFolderId)
+
+        // 하위 북마크들 모두 shared가 true인 상태로 변경해주기
+        changeBookmarkToShared(sharedFolderIdList)
+
+        // 토큰 발급
+        return FolderTokenDto(jwtProvider.createFolderToken(rootFolderId))
+    }
+
+    private fun changeBookmarkToShared(sharedFolderIdList: List<Long?>) {
+        val bookmarkList = bookmarkRepository.findAllByFolderId(sharedFolderIdList)
+
+        for (bookmark in bookmarkList)
+            bookmark.changeSharedTrue()
+    }
+
+    private fun folderToShared(folder: Folder, rootFolderId: Long): List<Long?> {
+        val folderIdList = mutableListOf<Long?>()
+        folder.folderToShared(rootFolderId)
+        folderIdList.add(folder.id)
+
+        folder.children?.let {
+            for (child in it) {
+                folderIdList.addAll(folderToShared(child, rootFolderId))
+            }
+        }
+
+        return folderIdList
+    }
+
     fun encryptFolderId(folderId: Long): FolderTokenDto {
         val folder = folderRepository.findFolderById(folderId) ?: throw FolderNotFoundException()
         return FolderTokenDto(jwtProvider.createFolderToken(folderId = folder.id!!))