The invention relates to an external control method for controlling the TV to search programs and its relative device, which uses the external
processing unit to send the open remote
signal to the TV
remote control interface, judges that the TV is opened according the caught data of IIC
bus at right time, sends a remote code of one program to control the TV switch into said program and sends the remote orders of entering the 'searching program' and the 'starting searching' while catching the data of
bus as feedback
signal at right time. The inventive device comprises a
single chip device, whose input-output port is connected to the IIC
bus of TV
chip when in working to detect the data of IIC bus, and another input-output port of said
single chip device is connected and transmit the
remote control signal to the remote interface of TV. The invention can solve the problem of using apparatus to control the TV to search program automatically without changing any structure of present TV.