Abstract: Demonstration with typical examples is usedand the family-sized economic system of Liuminying is ana-Iyzed and studied in this paper. The result indicates that it isnot only feasible but also very beneficial to establish a recy-cling comprehensive utilization system of vegetable-chicken-pig-biogas in the producing unit of one family.No matterjudging by the energy utilization or by the economic benefit,the result is very good.

Key words: agro-ecosystem, family-sized economy, ener-gy flow analysis, economic analysis