The invention provides a television set comprising a television set core system, a television function extension component and a golden finger. The television core system arranged inside the television set receives audio/video signals with different formats. The television function extension component provides different function selections. The golden finger is electrically connected to a place between the television set core system and the television function extension component. The golden finger comprises a first connection terminal and a second connection terminal. The first connection terminal arranged on the television function extension component comprises a first power supply signal terminal, a first communication signal terminal and a first audio/video signal terminal. The second connection terminal electrically connected to the television set core system comprises a second power signal terminal, a second communication signal terminal and a second audio/video signal terminal for electrically connecting the first power signal terminal, the first communication signal terminal and the first audio/video signal terminal respectively corresponding to the first connection terminal.