According to the methods of RS and GIS and after geometric correction,image fusion,image mosaicking and ortho-rectification for CBERS-02B image,the remote sensing image can be overlapped with DEM generated by TIN from the relief map. On the basis of 3D remote sensing images of a REE ore exploration area in Anyuan County,three-dimensional simulation can be applied to the three-dimensional analysis so as to study the geological environment of the mining area. Practices show that 3D remote sensing technology has great practical significance for selection of geological investigation route in areas where it is difficult to conduct field work as well as typical regional reconnaissance and mining production. In addition,it can find out the distribution pattern of the geological environment with great speed and accuracy,and can also be superimposed with vector data for the buffer analysis. Finally,the method can be used to analyze and predict the scale and development tendency of the geological hazards so as to provide the basis for decision-making on eliminating and tackling the hazards.