To provide a method and a device in which a material can be set on a pallet in advance outside the working device, a large number of materials set on the pallet can be stored in a stocker, and the materials are worked one after another to effectively use the working device.

A material A is set on a pallet 10 on a pallet truck, a large number of materials set on the pallet are stored in a stocker 80, one material in the stocker 80 is taken out, placed on a positioning truck and cut, and then, the cut materials are stored in the stocker 80 again, and taken out of the stocker 80 as necessary, and placed on the pallet truck to take out the product.