The establishment of soil information system is of great importance to soil information sharing and utilization. By taking Shaanxi Province for an example and using Geodatabase model and Access, the spatial and attribute databases were established respectively. Based on the ArcEngine 9.2 component and combined with ADO. NET technique,soil information system of Shaanxi Province was developed in VS 2005.NET environment. The system has several function models such as layer management,data management,output,spatial analysis,and evaluation models. The establishment of the soil information system is of great significance for soil informatization and decision2making of Shaanxi Province.