The invention discloses a key channel program configuration method, a TV control method, a TV control system, and a related device. The TV control method is used for a TV control system, and the TV control system comprises a mobile terminal, a playing host, a remote controller, and a TV set. The TV control method is characterized in that the playing host is used to receive a user-defined channel list transmitted by the mobile terminal, the device identification of the remote controller, and the corresponding relation between the remote control code value of the specific key and the user-defined channel list; the playing host is used to receive the playing instruction transmitted by the remote controller, and the playing instruction comprises the device identification of the remote controller and the remote control code value of the specific key; the playing host is used to search the matched user-defined channel list according to the above mentioned corresponding relation; the playing host is used to acquire the program content of the user-defined channel list according to the program list of the user-defined channel list; and the program content in the user-defined channel list can be transmitted to the TV set by the playing host, and then the TV set can be used to play the program content of the user-defined channel list.