DEGRADATION DIAGNOSIS APPARATUS FOR CRUSHER, CRUSHING SYSTEM, AND DEGRADATION DIAGNOSIS METHOD

The purpose of the present invention is to provide: a deterioration diagnosis device for pulverizers that is capable of diagnosing the deterioration of a pulverizer with high accuracy without stopping the pulverizer; a pulverizing system; and a deterioration diagnosis method. Provided is a deterioration diagnosis device (3) that is adapted to a pulverizer (2) which pulverizes a solid material, and that is equipped with: an acquisition unit for acquiring information pertaining to the current operating state of the pulverizer (2); a calculation unit for using the information acquired by the acquisition unit and a performance estimation model created on the basis of information pertaining to the initial operating state of the pulverizer (2) to calculate a performance value for the pulverizer (2) for when deterioration has not occurred; and an estimation unit for estimating the degree of deterioration of a pulverizing unit in the pulverizer (2) on the basis of the performance value and the information acquired by the acquisition unit.