The system comprises: a control center subsystem, a train station subsystem and a transmission subsystem. The control center subsystem comprises a digital video server, a broadcast control work-station, a network administrator / operator server, a central database server, a network encoder, a media material gateway, an audio and video switching matrix, an audio and video D / A and A / D converter, a digital TV device, a external signal source, a integration management software and a transmission interface. The train station subsystem comprises traveler guiding board, interface board, communication controller, power communication controller, control computer, traveler message sending out controller, station broadcast server, plasma display, and audio / video D / A converter. The train station subsystem broadcasts the real time information from the control center through the transmission subsystem, and adds its own information in it.