Abstract: The large and professional unmanned aerial vehicle based remote sensing (UAVRS) system has been widely used for the emergency survey of the wide range of geo-hazards. In this paper, the more simple and flexible micro-UAVRS method for the emergency survey of individual geo-hazard is put forward, based on a number of successful practices of emergency survey for geo-hazards in the Three Gorges Reservoir in recent years. The method includes: assembling a multi-rotor micro-UAVRS system that is more applicable for the emergency survey of the individual geo-hazard; developing the specific implementation process; and elaborating some crucial technologies and methods such as the arrangement and measurement of ground control points, the design of flight plan according to the features of geo-hazard, the control of the micro-UAVRS' flight and photos acquisition, and the image processing, etc. Practice shows that, using the micro-UAVRS method for the emergency survey of individual geo-hazard is useful, and capable of achieving the goal of fast & efficient, because the method can not only greatly reduce the work time, strength and risks, but also provide the high-precision remote sensing results and data.