Medium-low pluripotential complementary methane generating system

The invention discloses a medium-low pluripotential complementary methane generating system, which belongs to the methane generating field. The system belongs to a novel renewable energy resources combined generating system, adopts two-stage CSTR fermentation technology, realizes the annual stable high efficient running of the methane generating system on the condition of medium-low temperature and the lowest overall work condition energy consumption of the pluripotential complementary methane generating system through the complementary optimization integration with a hot pipe solar energy heat collecting unit, a low wind speed wind energy utilizing unit and a waste heat utilizing unit, only renewable energy resources are used and has no secondary pollution.