Abstract: There are many kinds of bio-energy technologies in rural area, and it’s propitious to choose the right technologies and promote the development of bio-energy utilization technology in rural area through determining the application range and economic of various technologies. The paper brought forward the concepts and calculation method of per household living energy cost to finish technical-economic assessment on the rural household biogas, biogas engineering, biomass densified biofuel, crop straw biogas, straw gasification and other technologies . The research results showed that household biogas technology has best economic; the second is biomass densified biofuel technology, while straw gasification technology is the worst. Along with the socio-economic development in rural area, biomass densified biofuel technology will be the leading technology gradually, and straw biogas technology could fill the gap caused by shortage of livestock manure.