A LCD television set includes a remote controller, a flat screen television processor, a docking base, and a first connector. The remote controller includes a first key group for operating the television set and a second key group for operating a smartphone. The flat screen television processor processes a television video signal, displays a frame on a display, and processes remote control signals corresponding to the first and second key groups. The docking base docks the smartphone and has the first connector in contact with a second connector disposed at the smartphone, such that an application processor of the smartphone and the flat screen television processor are electrically connected. The flat screen television processor outputs signals via the first and second connectors based on the remote control signals, thereby triggering the application processor to execute applications.