NOVELTY - A biogas tank generating system comprises generator (1), rotating shaft (2) provided with air-blowing blade (4) and input controller (5), methane tank (3), and storage tank (10) which stores obtained methane in which fermentation device converts electrical energy to heat energy using methane bacteria and rotating shaft is set at lower end of stirrer (201) and passes to lower part of rotating seat (202) fixed at bottom surface to extend fermentation and to contact fermentation liquid with methane bacteria when methane from storage tank is used as fuel through gas pipe (11) and hood (12).    USE - Biogas tank generating system for generating electricity in winter.    ADVANTAGE - The system has reasonable design, converts wind energy to electric energy, improves bacterial activity, completely uses fermentation liquid and methane bacteria, and increases methane generation effect.    DETAILED DESCRIPTION - A biogas tank generating system comprises generator, rotating shaft provided with air-blowing blade which drives generator to produce electric energy and input controller which adjusts wire and is connected to input inverter (6) of alternating current power to provide input (8) to fermentation liquor in fermentation device (9), methane tank, and storage tank which stores obtained methane in fermentation device in which fermentation device converts electrical energy to heat energy using methane bacteria at suitable temperature and rotating shaft is set at lower end of stirrer and passes to lower part of rotating seat fixed at bottom surface to extend fermentation and to contact fermentation liquid with methane bacteria when methane from storage tank is used as fuel through gas pipe and hood.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the biogas pool generating system.    Generator (1)    Rotating shaft (2)    Methane tank (3)    Air-blowing blade (4)    Input controller (5)    Input inverter (6)    Input (8)    Fermentation device (9)    Storage tank (10)    Gas pipe (11)    Hood (12)    Stirrer (201)    Rotating seat (202)