NOVELTY - A fermentation heat emitting unit (1) carries out natural fermentation of organic waste and generates fermentation heat. A thermal radiation unit (7), fermentation heat-emitting unit and a heat generation unit (2) are connected to a circulation pipe (3). A circulation pump (4) is provided in the middle to carry out circulation distribution of the thermal medium such as water. Heat exchange with the thermal medium is performed in the heat emitting unit and the radiation unit, by the heating of thermal medium by heat generation unit.    USE - Fermentation heat utilization system used for heating greenhouse and livestock barn. Can also be used for house heating, underground heating and soil heating, crop production, domestic heating application, etc.    ADVANTAGE - Since natural fermentation of organic waste such as livestock excretion and farm by-product is carried out to obtain fermentation heat, it becomes possible to operate the system in energy-saving environment which hardly requires a motive power source and hardly discharges carbon dioxide, etc. Since the fermentation heat-emitting unit piles up the container filled with organic waste, a series of circulation pipes are only penetrated, and the whole structure is simplified. Hence the system can be constructed at low cost, without requiring a large-scale facility, and the operation, adjustment, maintenance, etc., are easy, while ensuring high safety. Fixed emitted-heat amount can always be anticipated, without being received by the influence of temperature. Influence of weather with respect to fermentation process can be reduced, and a stable heat source is achieved. The high quality fermented compost can be used in farmland for crop cultivation, hence wastage is avoided. Heat emission can be carried out without interruptions. Since water is used as a thermal medium, there is no possibility of contaminating the environment.    DETAILED DESCRIPTION - The fermentation heat-emitting unit is piled up with a proper container filled with organic waste in horizontal and vertical directions, to form a circulation pipe. A series of circulation circuits is formed in the horizontal and vertical directions, for circulation and heat-exchanging of the thermal medium. The heat-generation unit has a thermal radiation unit which consists of a radiator (5) linked to the circulation pipe, and a fan (6). The air heat-exchanged with the thermal medium and heated up with the radiator is radiated through the fan. The switching of the flow path of the circulation pipe connected to the heat-generation unit from each fermentation heat-emitting unit is carried out one by one.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the fermentation heat utilization system. (Drawing includes non-English language text)    Fermentation heat emitting unit (1)    Heat generation unit (2)    Circulation pipe (3)    Circulation pump (4)    Radiator (5)    Fan (6)    Thermal radiation unit (7)