Abstract: Using the data collected from the field survey on the invasive alien species (IAS) in China, a Web GIS-based geographic distribution system was developed for information management and sharing. The design on the functions, database, and framework for the system was completed. It included the data query, browsing, thematic mapping, and map operation. The origins of the cited data and the established models from the IAS catalog,the system framework and detailed functions, as well as the advantages, shortcomings, and potential applications of this geographic distribution system are presented.