<;P>;PROBLEM TO BE SOLVED: To provide a method of manufacturing a useful fermented material efficiently by saccharifying and fermenting food waste (garbage). <;P>;SOLUTION: In the method for manufacturing the useful fermented material by saccharifying and fermenting the food waste (garbage), diastatic enzyme is fed to the food waste (garbage) to saccharify it and then the food waste is solid-liquid separated, the filtrate after the solid-liquid separation is fed to a fermentation tank and fermented to obtain ethanol and organic acid, and the residue after the solid-liquid separation is aerobically fermented, vaporized, condensed, and dried to produce fertilizers and feed, etc. <;P>;COPYRIGHT: (C)2011,JPO&INPIT