The present invention provides a system and method for interfacing between a digital TV and a plurality of remote controllers, remote controller thereof, and remote controller signal transmitting method thereof, by which Java API enabling to support a plurality of remote controllers is defined to enable interfacing between the digital TV and a plurality of the remote controllers. In interfacing between a digital TV and a plurality of remote controllers, the present invention includes the steps of defining an event class including remote controller identifiers enabling to identify a plurality of the remote controllers, respectively and identifying a plurality of the remote controllers using the event class including the remote controller identifiers, respectively and controlling the digital TV according to a signal received from the identified remote controller.