Abstract:In this paper, "pig breeding - cultivation of agricultural products " mode (mode II) as the reference, the resources recycling mode of "pig - biogas project - biogas slurry residue -- the cultivation of agricultural products" (modeⅠ) is evaluated by using the energy theory. The analysis on the typical case is shown in: First, in modelⅠis higher than that of in mode II; the net energy yield ratio of crop production subsystem in model I is 3.02 times of model II, that of agricultural system 2.01 times. Second, the rural household biogas technology application can be more effective use of waste resources of aquaculture (manure) and promote between the agriculture planting industry and breeding industry interests more closely. Third, biogas technology has advantages of low environmental pressure, high resource utilization efficiency, and good economic benefit. Fourth, it is effective means of the rural farming fecal pollution controlling, rural clean energy developing, and modern ecological agriculture sustainable developing.