Abstract: With the help of the relevant mathematical analysis approach,an investigation of dynamics of the forest resources based on the theoretical foundation of forest management was conducted withGIS used as a platform of system management. Its information sources come from data and digitalmaps of forest resources of Sanming City from 1996 to 2005. The result indicats that:the area of forest land of Sanming City has increased steadily. Althoughforest coverage rose and fell,it generally remained at a level of 76.8%. Thearea of the planted forests has increased,while the area of nature forests decreased year after year. The growing stock of standing timber has had a trend of increase since 1996. This study provids a scientific basis for drawing up policiesof sustainable development of forestry of Sanming City and a technologicalbasis as well and will be of a great value for promoting informationization ofthe management of forest resources.

Key words: forest resources, dynamics, GIS