At 2:28p.m., May 12^th, a 7.8 degree earthquake happened in Wenchuan, Sichuan province. According to the overall deployment of MOST, the National Remote Sensing Center got the emergency mechanism in gear. The emergency plan set by the newly established emergency work group included: providing the video documents of Beijing No.1 satellite to the State Disaster Prevention and Mitigation Committee, having real-time shooting to get the latest images of the disaster-stricken area and offering suggestions for earthquake relief and rescue in the area.