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Seismic system has implemented the single point to point video conference between seismic system and relevant government's emergency services. In order to meet the dual even multichannel video meeting demand, we use the analog-to-digital and digital-to-analog technology of codec and also we add the audio and video switcher module, audio and video distributor module, two pairs of twisted-pair transmitter module. Finally, we implemented the dual point to point video conference between emergency hall and the municipal government emergency office, between emergency command hall and the municipal government emergency office, meanwhile, we implemented the multi-channel video source signals transmission function between our Administration and the emergency office ,thus expanding bilateral channels of communication, enriching communication information, ensuring the timely and effective information transmission.