NOVELTY - Producing artificial natural gas and organic fertilizer comprises building synthetic artificial and natural gas in a fermentation tank, passing collected solid organic raw material via a feeding case through a feed gate into the fermenting tank, adding organic matter-containing waste water into the fermenting tank through the feeding pipe to soak the organic raw material and then fermenting to obtain artificial and natural gas and organic fertilizer, collecting the natural gas in a cabinet through a collecting device, discharging the biogas residue from the fermenting tank.    USE - The method is useful for producing artificial natural gas and organic fertilizer (claimed).    ADVANTAGE - The method effectively produces artificial natural gas and organic fertilizer with high utilization of natural resources and without pollution. The organic fertilizer improves agricultural production and quality of the grain crops in a cost effective manner.    DETAILED DESCRIPTION - Producing artificial natural gas and organic fertilizer comprises building synthetic artificial and natural gas in a fermentation tank, passing collected solid organic raw material through a feeding case through a feed gate into the fermenting tank, adding organic matter-containing wastewater into the fermenting tank through the feeding pipe to soak the organic raw material and then fermenting for 1-2 years to obtain artificial and natural gas and organic fertilizer, collecting the natural gas in a cabinet through a collecting device, discharging the biogas residue from the fermenting tank through a discharging fertilizer output device after the natural gas pressure is reduced and then ground drying and storing, where the fermentation tank is provided with the feeding gate, a feeding tank, a feeding plate, a top part of the fermentation tank is provided with the feeding pipe, a heat absorbing plate and a heat preservation cover, the feeding pipe is connected between a gas collecting device and an output device, a bottom part of the fermentation tank is provided with the feeding plate, the heat energy is irradiating from the sunshine on the heat absorbing plate to the fermenting tank, the heat preservation cover is used to store heat in organic raw material and anaerobic bacteria solution in the fermentation tank.