Abstract: A Green Building Plant Resources Information System(GBPRIS) is established with the aid of the computer database technology.It is composed of four basic databases,i.e.plant fundamental characteristic database,plant ecological function database,plant community database,and evaluation system database.This information system encompasses information and data on 500 species of plants and 48 plant communities common in Shanghai,and has all the information about biological characteristics,ecology habits,and various ecological functions of these plants standardized and digitalized,thus reducing the professional requirements for selecting green building plants.Besides,the system is designed for multiple accesses and quick reference of documents and images.It can be used not only to evaluate existing greening systems and to give out corresponding proposals for improvement,but also to pre-evaluate designs of outdoor landscaping,thus providing collocation of plants in green building programs with scientific references.