The present invention relates to a clean energy farming systems, receive or supply the crop by-products from crop cultivation facilities, receive supplies livestock manure from livestock facilities, supplied with food processing by-products from food processing plants, crop by-products, or livestock manure, or food processing by-products the anaerobic digestion plant for anaerobic digestion; Solid-liquid separation device for solid-liquid separating the slurry generated in the anaerobic digestion plant; The composting facility to compost the solid material separated through the solid-liquid separation device; Manure production facilities aekbihwa the liquid material separated through the solid-liquid separation unit to supply a crop facility; Bio-gas purification device for the purification and methane and carbon dioxide from biogas from anaerobic digestion plants, supplying purified carbon dioxide to the cultivation facilities; When supplied with the fuel from the methane in the biogas purification apparatus, the crop conditioning device for cooling or heating facilities; and characterized in that it comprises a.
According to the present invention as described above, the present invention is to remove the methane and carbon dioxide of the biogas produced, by use of a high purity methane as a fuel for heating and cooling to reduce the cost of energy input to the facility, the growth temperature by the seasonal air through the adjustment of the effect of increasing the revenue of the crop and, by supplying carbon dioxide separated and purified according to the growth period of the crop, by increasing the photosynthesis of the crop can be achieved an effect that the increase of crop production.