To provide a method and equipment for marking which execute a marking operation automatically while changing the position and dimensions automatically in accordance with the size of a material.

On the occasion when prescribed items are marked on the residual material after a processing or a product, a marking origin determining part 47 determines a marking origin (Y0, Z0) to be a reference of marking by using material sizes stored in a memory 45 of a control device 37 and a marking dimension determining part 49 determines the dimensions of the marking which can be made on the material, on the basis of the material size and a marking range R by a marking head. The marking head is moved thereafter according to a command of a marking command part 51 and the prescribed items are marked in the prescribed dimensions.