A method for sharing file of a first electronic device used by a user using a share message implemented by a computer may include: uploading a file to be shared with a second electronic device used by the user to a server according to the share message transmitted through a chat session set between an account of the user of the first electronic device and the server providing a cloud service; storing the share message including a link of a storage location of the server for the file uploaded to the server as an instance message of a private chat room corresponding to the chat session; and displaying the share message stored as the instance message through the private chat room on a screen of the first electronic device, wherein the second electronic device may be configured to access the private chat room with the account of the user.