The development internet is no doubt of a leap on technology, which realizes the resource sharing in worldwide. However,the bandwidth problem has always been restricting its application for a long time. The appearance of the standard of European DVB (digital video broadcasting ), has offered a kind of flexible, high-efficient way for frequently, audio frequency, datum of transmitting machine in the same channel, through the satellite, cable or ground channel, convey TV programme and other service information digitized to user's end. People have already seen the enormous advantage of DVB in respect of transmission in audio frequency and video digitization, DVB has enormous potentiality in data transmission too.