Abstract:According to Miami model and Thornthwaite memorial model, the net primary productivity, the outputs of cereals and wood in Guangdong Province were assessed by using data of annual temperature, rainfall and evaporation. Then, plant climatic productivity maps were drawn. The results showed that the vegetation potential productivity in most areas of Guangdong was large, and decreased gradually from the coastland to the inland,and the trend of the isopleth roughly paralled with the coastline except few areas, the highest values were in Haifeng, Yangiiang, Qingyuan and Fogang counties, on the contrary,the lowest in the north and northeast of Guangdong and on Leizhou Peninsula.