Abstract: The paper aims to study the suitable meteorological conditions for pepper growth so as to determine the corresponding meteorological index and geographic coverage, and support the scientific planning of pepper industry as well as making rational use of climatic resources in Wudu, which is with particular topographic and climatic conditions. Considering the whole growth period and the botanical developmental characteristics ofpepper, we conducted a contrastive observation between botanical developmental characteristics and meteorological data obtained by agricultural climate observing stations in continued two years based on the selection of typical pepper breeds. The critical periods of pepper development as well as dominant and subsidiary meteorological indexes that had the greatest effects on pepper growth were determined. After the region indexes were determined, the pepper plantation region of Wudu was analyzed by ideal condition, preferable condition, suitable condition and unsuitable condition. Finally, the suitable regionalized charts of pepper plantation in Wudu district were proposed through GIS. The results showed that: the districts whose altitude were between 900 m and 1200 m, such as the valleys, plains and gentle slope belts of mountains in southern Wudu area and Bailong river basin, were ideal climatic zones for planting pepper trees; meanwhile, the cold and damp mountainous areas in northwest of Wudu whose altitude was over 2000 m, as well as the dry and hot areas in Wudu whose altitude was below 700 m, were the most unsuitable climatic zones for planting pepper trees. The results are in according with the requirements of pepper growth and provide references for planning the pepper industry in Wudu.