Abstract: According to the principles of economic metrology and based on the qualitative analysis of the factors influencing the development of agricultural mechanization, authors established a mathematical model with simultaneous equations. To find out the specific expressed formula with simultaneous equations, authors calculated a large amount of statistical data within recent ten years from Quan-jiao County, An-hui province, PRC. by electronic computer. Based on this expressed formula, authorsare successfully to complete the analysis, the forecast and the experiment of strategic decision for agriculture and agricultural mechanization.