Abstract: To the need of soil fertility survey in precision agriculture, a soil spatial information management system was developed in the paper, which could integrate soil sampling, testing, storage, spatial data management and release under a loose-coupling system. The system can manage the process of soil sampling, testing and storage based on barcode as well as release spatial data based on WebGIS. Furthermore, the synchronization problem of Heterogeneous Database had been resolved by using web service technology. Application in practice shows that the system design concept and architecture can meet the need of precision agriculture information acquisition, information management, while it also has a good prospect on the large-scale soil survey and soil monitoring.