Abstract: The author considers that countryside is a complex ecosystem of society--economy--nature with agricultural management as the main body, which consists of three subsystems, i.e., 1. productive system,2.processing system and 3.transportation and sale system. To simulate the principle of interadaption between structure and function of ecosystem and establish a reasonable agriculture-industry structure is the basis of realizing the integration of production, processing, transportation and sale and the link of accelerating material turnover and stimulating rural economy.