Taking Soil Taxonomy Information System of Shaanxi Province as an example,the thematic mapping method and technology based on Google Earth(GE) are analyzed.A general thematic mapping flow based on GE is suggested.Details of mapping process and key techniques are discussed at each step of the mapping flow.Two defects of GE mapping tools are pointed out and its resolution is proposed.Mapping results and application mode of Soil Taxonomy Information System of Shaanxi Province are presented.