Faced to the present agro-environmental information features, there exist several difficulties to acquire and control the agricultural environment information, such as the scattered information with spatio-tempel traits, the methods of quantification and the huge data amount. This paper constructed an agro-environmental information service system based on the spatial database, computer network and geographic information system (GIS) technology. This system was applied in Jianshui County, Yunnan to implement the system functions including the collection, storage, analysis, visual output and intelligent evaluation. The system with these functions applied technical support for Jianshui county to improve the abilities both in local agricultural products and environmental protection. And it provided a precedent for other Counties in Yunnan to construct agricultural environmental information system.