System don't need expensive image splicing processors and video matrix, using CAT5/6 class line, simple wiring requirements, greatly reduce the cost of the whole system, and is not restricted by distance, no transmission distortion; Using network modular design, with strong flexibility and extensibility, can increase or decrease display unit and signal source; System is suitable for all kinds of display unit, such as the PDP, LCD, DLP, full-color LED and so on.