To provide a recycling method which shows high recycling efficiency and low operating cost without sacrificing safety, nutritive ingredients and flavor, with regard to not only specified food residues but also various food materials, as well as a recycling method using this device.

This method for recycling unused food resources comprises the following processes: (1) A first process to sort out unused food resources and load the sorted ones into a first grinder, (2) a second process to input data such as the description and quantity of loaded unused food resources, then thereby set a drying mode according to ground grain size and by a heat dryer and set the grain size of a final finished product, (3) a third process to actuate the first grinder so that the loaded unused food resources come out to be as per the ground grain size set in the second process, (4) a fourth process to charge the grinds formed to the specified grain size into a drying chamber of the heat dryer, and a fifth process to set a heating temperature and a drying time of the heat dryer based on drying mode set in the second process and perform heat drying of the grinds charged in the drying chamber. Finally, the heat dried grinds are charged into a second grinder and further finely ground to the grain size, of the final finished product, set in the second process.

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