The video conference system established as a tenth "Five-year Plan" project is now playing more and more important role in earthquake emergency. This essay introduced the properties and application of video conference system in earthquake emergency system of China, analyzed the problems of the image sound blocking and control asynchrony in the M_S7.0 earthquake in Jiuzhaigou, Sichuan and the M_S6.6 earthquake in Jinghe, Xinjiang. According to results of the testing, we discussed the reasons affecting the quality of video conference. In order to further strengthen the ability of earthquake emergency video conference service, we propose the establishment of a video conferencing system construction standards and service quality standards to enrich the means of the communication after the earthquake.