Abstract: The utilization of biogas showed many benefits including saving energy, protecting environment, reducing the use of pesticides and chemical fertilizer, improving the yield and quality of crops, and promoting the development of animal husbandry.This paper introduced the rural biogas in Nanjing County and summarized its current development status and the main procedure and measures of rural biogas building and service system.Finally, the existing problems of biogas building work were analyzed and some advices were proposed.