This is a kind of new gas equipment. Mainly includes: the software can be folded biogas fermentation bag, methane storage bag, biogas Desulfurization device, booster pump, water separator, biogas pipes and associated fittings. The main body of the equipment is software can be folded biogas fermentation bag, is made of high strength plastic material (two-sided PVC net clamping cloth or high quality PVC tensile membrane) by high-frequency induction into the outlet, inlet, and outlet. Methane tank pressure is low, not high requirements for preventing leakage. To use low pressure cooker or pressure, sandbags and other heavy objects in the gas bag, or the use of booster pump, to increase the gas pressure.