NOVELTY - The integrated anaerobic and aerobic link composting system comprises an anaerobic reaction tank that mixes and composts livestock excrement and composting group under the condition without oxygen by a screw agitator (4) and collects biogas generated during methane fermentation through a collection part installed in an atiic space, and an aerobic reactor that is horizontally installed with the anaerobic reaction tank, is provided with some of the compost fermented in the anaerobic reaction tank and mixes and composes it with the compost group stored inside by a screw agitator.    USE - The integrated anaerobic and aerobic link composting system is useful for producing methane gas.    ADVANTAGE - The integrated anaerobic and aerobic link composting system can minimize the bad small generation according to the conduction of the aerobic fire-extinguishing during the methane production.    DETAILED DESCRIPTION - The integrated anaerobic and aerobic link composting system comprises an anaerobic reaction tank that mixes and composts livestock excrement and composting group under the condition without oxygen by a screw agitator (4) and collects biogas generated during methane fermentation through a collection part installed in an atiic space, and an aerobic reactor that is horizontally installed with the anaerobic reaction tank, is provided with some of the compost fermented in the anaerobic reaction tank and mixes and composes it with the compost group stored inside by a screw agitator. The anaerobic reaction tank and the aerobic reactor are composed to the screw agitator and are installed coaxially to increase agitation efficiency. The screw agitator of the anaerobic reaction tank is composed to pump and directly inject slurry into the compost. The screw agitator of the aerobic reactor inhales the outside air and directly injects air to the inside of the compoting system. The composting system further comprises a nozzle hole (46) in which a suction fan (44) is comprised, a rotary shaft (41), a screw flight unit, a hopper (43), an exhaust tube (45) formed into an inside axial direction of the rotary shaft to guide the air flowed in by force into the inside of the rotary shaft through the inhalation hopper, and a hot water pipe or a heating coil. The screw flight is bonded to the outer periphery of the rotary shaft. The rotary shaft rotates a motor. The exhaust tube ejects the air that is guided through the exhaust tube to the width direction of the rotary shaft. The exhaust tube is connected to the slurry tank. A nozzle hole is connected to the exhaust tube to eject the slurry guided through the exhaust tube to one end of the rotary shaft. The nozzle hole is arranged in a lower part of the rotary shaft. An insulating material is installed in an inner periphery of the aerobic reactor and the aerobic bioreactor.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic cross-sectional view of a screw agitator of a compositing system.    Screw agitator (4)    Rotary shaft (41)    Hopper (43)    Suction fan (44)    Exhaust tube (45)    Nozzle hole. (46)