this paper focuses on the technical process and operation skills of building three-dimensional model,texture mapping,3D model publishing in Google Earth. It has been proved that this method has theadvantage of flexibility in the construction of 3D virtual campus which has guiding significance. Inconclusion, the technology road map based on KML and Google SketchUp technology for 3D virtualcampus system is feasible and practical and shows advantages in the aspects of model optimizationand lightweight architecture.