NOVELTY - Fermenting device comprises a pre-treating tank, a fermenting pot body, a hot water circulating pipe, a heat collecting system, a circulating pump and a sludge pump; the outer layer of the fermenting pot body is made of heat-insulating material; the inner part of the fermenting pot is divided into upper and lower two layers by a clapboard; the upper layer is an anaerobic fermenting marsh gas tank; the anaerobic fermenting marsh gas tank is connected with a feeding pipe and a discharging pipe; the upper part of the fermenting pot body is connected with an air conveying pipe.    USE - The fermenting device is useful for processing organic waste.    ADVANTAGE - The device: can circulate and mutually utilize the anaerobic marsh gas tank and the high-temperature aerobic fermenting energy; and can be easily popularized.    DETAILED DESCRIPTION - Fermenting device comprises a pre-treating tank, a fermenting pot body, a hot water circulating pipe, a heat collecting system, a circulating pump and a sludge pump; the outer layer of the fermenting pot body is made of heat-insulating material; the inner part of the fermenting pot is divided into upper and lower two layers by a clapboard; the upper layer is an anaerobic fermenting marsh gas tank; the anaerobic fermenting marsh gas tank is connected with a feeding pipe and a discharging pipe; the upper part of the fermenting pot body is connected with an air conveying pipe; the marsh gas tank on the clapboard is connected with the hot water circulating pipe; the lower layer is an aerobic aeration tank; the periphery of the tank body is provided with the hot water circulating pipe to absorb the heat energy generated by fermenting process; the aeration tank is connected with hot water pipe inlet and outlet, high-concentration organic waste inlet and outlet; the side face of the upper part of the aeration tank is provided with an air outlet; the middle part is provided with a baffle plate which is connected with a first-grade aerobic fermenting tank and a second-grade aerobic fermenting tank through the sludge pump; two tanks are connected by the sludge pump; the middle part of the aeration tank is provided with a rotary shaft in horizontal direction; the upper part is provided with an aeration pipe; the pipe is provided with aeration holes; the shaft is also connected with an agitating paddle; the hot water circulating pipe is connected with a heat collecting system; the heat collecting system can collect heat by solar energy and also can collect heat by a ground source heat pump.