Abstract: A system and a method of remotely controlling a TV tuner over a TCP/IP network is described. The system includes a client module and a host module, which are connected to each other through the Internet. The host module has a TV tuner device such as AGP/PCI TV card or USB TV Box installed. The client module has a simulation GUI of a TV. The client module sends a control command to the host module and renders a video/audio data stream feed by the host module. The method includes: the client module encodes the control command and sends it to the host module over the Internet. The host module receives the control command, decodes it, gets the related control instruction; and then operates the TV tuner to implement the related function and to generate new content video/audio stream for the client. The client renders the video/audio stream.