NOVELTY - A biogas production system comprises biogas tank (1) and connecting pipe (2) in which biogas tank comprises biogas production tank body and tank cover hinged to upper part of tank body, tank body contains electric heating tube (3) and electric heating tube control device, end of connecting pipe passes through tank cover and is connected to tank body, other end of connecting pipe is connected to storage device, storage device comprises pedestal (4) and gas storage bag (5) containing set of gas cavities, and bearing housing (10) is fixed on pedestal, pipe is connected to gas cavity.    USE - A biogas production system (claimed).    ADVANTAGE - Biogas production system is easy to carry and has high efficiency, small floor space, low production cost, good sealing performance, and improved biogas yield.    DETAILED DESCRIPTION - A biogas production system comprises biogas tank (1) and connecting pipe (2) in which biogas tank comprises biogas production tank body and tank cover hinged to upper part of tank body, tank body contains electric heating tube (3) and electric heating tube control device, end of connecting pipe passes through tank cover and is connected to tank body, other end of connecting pipe is connected to storage device, storage device comprises pedestal (4) and gas storage bag (5) containing set of gas cavities, bearing housing (10) is fixed on pedestal, pipe is connected to gas cavity, pipeline structure between set of pipes connect gas cavities in series, upright post (6) is fixed on vertical axis of pedestal and contains pressure holding mechanism, 1st programmable logic controller (PLC) programmable controller (17) is fixed to pedestal, pipeline structure comprises set of connection valves and main pipe (9), gas storage bag contains mounting hole, each gas storage bag contains ring-shaped 1st bag body and 2nd bag body, pressure holding mechanism comprises nut and ring-shaped pressing plate, control device comprises 2nd PLC programmable controller (18) and temperature sensor (19), upper part of upright post is connected to driving mechanism, and driving mechanism comprises bracket (16), coupling (15), and motor (14).    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of biogas production system.    Biogas tank (1)    Connecting pipe (2)    Electric heating tube (3)    Pedestal (4)    Gas storage bag (5)    Upright post (6)    Main pipe (9)    Bearing housing (10)    Motor (14)    Coupling (15)    Bracket (16)    1st PLC programmable controller (17)    2nd PLC programmable controller (18)    Temperature sensor (19)