A method for playing Web TV by a set top box system, and said set top box system including a set top box and a multimedia player, and said set top box including a first interface, a network transmission interface, a data transmission interface and a control unit, and said multimedia player including a second interface and a multimedia processing unit;
- and said first interface being coupled to said second interface, and said method for playing said Web TV set top box system comprising the steps of:
- transmitting at least one network audio/video data from an external network or at least one first audio/video signal from said multimedia player from said set top box to said multimedia processing unit when said first interface is coupled to said second interface;
- converting at least one of said network audio/video data into at least one of said second audio/video signals;
- and
- outputting at least one of said first audio/video signals or at least one of said second audio/video signal.