The simulation model on the agriculture system in Tongwei County was checked by the comparing 180 pairs of simulated data in a base-run with statistic data in previous 15 years, the result indicates that the model is an available prediction with an availability of 85%. Four selective developing layouts for agriculture in the county, the crop-leading, the forest-leading, the breeding-leading and the comprehensive developing type wore simulated in IBM PC/XT computer for the period of 1985—2030 year. A dynamic change tendencys of several major objective, the areas of land use and the productive values for crop planting, forest and livestock breeding, and the total yields of crop were separately discussed at three developing steps in the year of 1990, 2000 and 2030. An optimum selection of the four layouts was determined utilizing a multi-purpose comprehensive Fuzzy-adjudgment technique. The comprehensive layout is the best one in a general benefit and effect for economic, ecology, social and exercisable respects. Therefore, the layout can be used as an agriculture developing model in the county. By the end of this century and the year of 2030, the predicted values of total product of the layout would increase by 1.56 times. A dynamic simulatijon optimization technique is a useful tool to make a comprehensive agriculture developing plan for a region.