South China Sea geological information database system is established based on data and practice in South China sea. The system is designed for sharing, fusion and analysis geological data to supply a simple method for offshore engineer. ADO, DAO, OLE and other computer technology are used to make data resources quickly import and export. The soil properties such as effective unit weight, shear strength, unit of surface friction, unit tip resistance changed with the depth are described. These can be found through the layer number, depth, and the nature of the soil and so on. The summary function can draw curve, compare the soil parameters in same or different project. It could be used to guide design and construction.