Abstract: Based on the actual need, with the support of ArcView and FoxPro, the management decision support system for agricultural resources on a county scale was developed. Its components include not only land resources, water resources, climate resources and biome resources as the bases, but also all kinds of crops, livestock, fruits, production means used to produce these productions and the market. Then this article introduces the application case of the system in Ningjin County of Shandong Province. According to the expert knowledge databases, the management decision support system for agricultural resources at a county level combines the modern computer and GIS technology with the geographical and socioeconomic conditions to achieve the rational utilization, improve the production efficiency of agricultural production means, and mitigate environmental problems resulted from agricultural production.