NOVELTY - Biogas generation process involves pre-treating raw material by providing crushed materials into biogas manufacturing digester, adjusting content of raw material component containing carbon and nitrogen in the ratio of 20-30:1, providing the liquified product into desander, carrying out anaerobic fermentation process in fermenter, providing resultant product into desulfurization tank, adding desulfurizing agent, purifying biogas, providing resultant product into caustic alkali washing tank, dewatering tank and water-absorbing tank, and providing resultant product into storage tank.    USE - Biogas generation process (claimed).    ADVANTAGE - The method economically provides biogas with high quality and high yield.    DETAILED DESCRIPTION - Biogas generation process involves pre-treating raw material by providing crushed materials into biogas manufacturing digester, adjusting content of raw material component containing carbon and nitrogen in the ratio of 20-30:1 and pH value becomes 6.8-7.5, stirring the resultant product to obtain liquefied material, providing the resultant product into desander, carrying out anaerobic fermentation process in fermenter by adjusting the oxygen concentration which is lower than the concentration in digester, providing the resultant product into anaerobic fermentation tank, heating the resultant product, joining anaerobic fermentation tank and desulfurizer, providing the resultant product into desulfurization and fermentation tanks, adding desulfurizing agent in which hydrogen sulfide is produced, precipitating the resultant product, stirring the resultant product under 0.5 m/second or less, connecting the fermentation tank to biogas pipeline, puryfying biogas using anaerobic methane fermentation tank, washing tank for cleaning in which washing is carried out using water, providing the resultant product into caustic alkali washing tank, then dewatering tank for dehydration and water-absorbing tank, then providing resultant product into primary storage tank, measuring pressure in which the pressure reaches preset pressure a primary gas pressure sensor sent an electrical signal then controller is closed the solenoid valve, then providing the resultant product into secondary storage tank in which secondary electrical signal is appeared, and then providing the resultant product into tertiary storage tank. The content ratio of raw material in desulfurizer and fermenter is 1-600:800.