Soil classification reflects level of the overall research in pedology.An intelligent inquiry system for reference between the Genetic Soil Classification of China(GSCC)and the Chinese Soil Taxonomy(CST)based on the 1:1 000 000 soil database of China,and the techniques of WebGIS has just been established recently.The system has a Browser/Server frame-work,ArcIMS as its soil map data releasing platform,ArcSDE as its spatial database engine,and relational database SQL Server 2000 as the tool for integrated management of soil spatial and attribute data.Consists of 3 sub-modules based on national,regional(provincial),and pedon scales respectively,the system is designed to conduct reference of pedon data or between the spatial distribution features of 2 soil classification units in the 2 different classification systems.With the help of the said inquiry system,researchers interested are able to retrieve conveniently related soil classification reference information as detailed as possible.