NOVELTY - Method for processing organic waste, involves (a) performing dry-type methane fermentation of organic matter contained in the organic waste, and (b) performing solubilization of the fermented product for producing organic matter having low molecular weight.    USE - Method for processing organic waste, e.g. dried product of garbage, organic refuse, foodstuff industrial waste, sewage sludge and livestock farming waste, and producing residue and aqueous ammonia, which is used as incinerator and engine denitration liquid.    ADVANTAGE - The method enables efficient, environment friendly and cost effective processing of organic waste without generating wastewater, as installation of water treatment is not required, electric power cost is reduced and waste heat generated during electric power generation using biogas is used as energy for the processing.    DETAILED DESCRIPTION - Method for processing organic waste, involves (a) performing dry-type methane fermentation of organic matter contained in the organic waste, and (b) performing solubilization of the fermented product for producing organic matter having low molecular weight. The method involves obtaining required amount of fermented product after methane fermentation treatment, dividing the product into first processed material and second processed material, performing solid-liquid separation of first processed material and separating the material into liquid and residue, and using the mixture of liquid and organic waste separated from the first processed material in the methane fermentation process (a) or solubilization process (b). The solubilized material obtained after the process (b) is used for methane fermentation process (a). The second processed material is used for process (b). The process (b) is performed at 70 degrees C and aqueous ammonia is recovered. The amount of aqueous ammonia recovered in process (b) is controlled such that the dry type methane fermentation is possible, without generating wastewater.