The invention discloses a multifunctional set top box, comprising a machine case, functional buttons, an information display window and a DVD (digital video disk) optical driver, and further comprising an electronic controller, wherein the functional buttons, the information display window and the DVD optical driver are arranged on the machine case, the electronic controller comprises a detuning device and a TS (transport stream) code stream demultiplexing device, the TS code stream demultiplexing device is connected with a first audio and video port of an audio and video decoder, the audio and video decoder is provided with a video output port connected with a PAL/NTSC (programmable array logic/national television system committee) encoder, the PAL/NTSC encoder is connected with an audio and video interface, the audio and video decoder is provided with the audio output port which is connected with the audio and video interface, the multifunctional set top box further comprises a controller which is connected with an infrared remote-control interface, the functional buttons, the information display window and the TS code stream demultiplexing device, the controller is connected with a control port of the audio and video decoder, and the multifunctional set top box further comprises an optical driver, a USB (universal serial bus) interface and a laser head reading module, wherein the optical driver is connected with the controller, and the laser head reading module is connected with a second audio and video port of the audio and video decoder.