This paper has analyzed the functions and features of Spatiotemporal Database and its model in brief. The conception of difference storage of version is used on the basis of object-oriented spatiotemporal data model. And then, a basic method of designing Spatiotemporal Data model with less historical data redundancy and high usage of current data is discussed. A Spatial data management system with basic functionality and effective balance of storage and operation is also implemented at the end of the paper.