Multimedia contest responder used on computer

The utility model relates to a multimedia contest responder used on a computer. A circuit board is arranged in a housing; the core of the circuit board is a singlechip integrated circuit; a USB interface circuit provided by the integrated circuit is connected with a USB socket of the computer; and a row and column circuit of a matrix circuit also provided by the integrated circuit is connected with an external responding button through RJ11. Special supporting software on the computer is utilized to perform the functions of contest response, contest problem setting, team management, contest smart scoring, result statistics, result query and the like on a large-screen computer or in a projection system in the form of a multimedia.