A cutting method to cut an end surface of a workpiece is disclosed. The method includes: providing a cutting unit (20) having a rotary shaft (21) and a cutting blade (24) protruding toward the end surface side of the workpiece; rotating the cutting blade around the rotary shaft; cutting the end surface of the workpiece by bringing the rotating cutting blade into contact with the end surface of the workpiece; measuring a predetermined parameter indicating an overheated condition of the cutting unit after completing a predetermined number of batches of a cutting process; and adjusting a relative position between the cutting blade and an end surface of a workpiece to be cut in a subsequent batch, before beginning the cutting process of the subsequent batch, such that external dimensions of the workpiece, which are to be obtained by the cutting process of the subsequent batch would not be beyond a required allowance. The method can satisfy the required dimensions of a workpiece.