An event notifying method includes determining whether a current home network, which is currently connected to a remote user interface server (RUIS) in a home network, is a user's home network selected by a user so as to be allowed to be notified of the event, selectively providing an event page to a remote user interface client (RUIC) selected by a user in the user's home network, and performing user authentication prior to providing the event page, thereby ensuring security of the user's private information.