NOVELTY - Methane generating system comprises a fermented raw material storage tank provided with a solid content fertilizing unit for storing fermented raw material, a preprocessing unit having a solid-liquid processor connected to fermented raw material storage tank, a methane generating unit connected to a wastewater processor, a methane fermentation tank and an acid fermentation tank, a moisture removing and desulfurizing unit for removing moisture and sulfur and connected to a dry desulfurizing unit, a dehumidifier and a gas storage tank, and a power generation unit for generating power.    USE - Used as methane generating system.    ADVANTAGE - The system increases methane production efficiency, blocks contact with external air during anaerobic reaction, removes odor and harmful sulfur content.    DETAILED DESCRIPTION - Methane generating system comprises a fermented raw material storage tank provided with a solid content fertilizing unit on an inlet port for storing the fermented raw materials mixed with livestock manure and food waste, a preprocessing unit (1) having a solid-liquid processor connected to the fermented raw material storage tank, a methane generating unit (2) connected to a wastewater processor, a methane fermentation tank and an acid fermentation tank from the solid-liquid processor, a moisture removing and desulfurizing unit (3) for removing moisture and sulfur from the gas and connected to a dry desulfurizing unit, a dehumidifier and a gas storage tank from the methane generating unit, and a power generation unit (4) for generating power into methane extracted from the moisture removing and desulfurizing unit. The acid fermentation tank is installed with an ultrasonic wave generating unit for disrupting cells within the sludge, and a pump and pressure valve for forming turbulence between the acid fermentation tank and the methane fermentation tank. The acid fermentation tank and the methane fermentation tank are equipped with a heat exchanger for controlling the temperature of each fermentation tank. The power generation unit has a combustion boiler, and a hot water tank for storing hot water heated by the combustion boiler. The heat exchanger controls the temperature of the fermented raw materials and heat exchanges between the hot water and the hot water tank. The dry desulfurizing unit supplies less amount of ammonia gas and maintains alkalinity using ferric hydroxide as desulfurizing agent. The temperature of the acid fermentation tank is maintained at 35-37 degrees C. The temperature of the methane fermentation tank is maintained at 44-46 degrees C.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the method for methane developing process suing methane generating system (Drawing includes non-English language text).    Preprocessing unit (1)    Methane generating unit (2)    Moisture removing and desulfurizing unit (3)    Power generation unit (4)    Generator (4-1)