PURPOSE: To positively confirm whether products as instructed in a delivery instruction is loaded so as to prevent such inconvenience as to deliver wrong products by reading a product packing number at the loading time, and judging on whether this product packing number coincides with an previously inputted product packing number.

CONSTITUTION: A terminal device 1 is provided to instruct the description, quantity, delivery destination, and the like (delivery instruction data) of products to be delivered, and necessary processing is performed by an inventory control device 2, on the basis of the delivery instruction data and inventory control data so as to prepare a delivery instruction. On the basis of the contents of this delivery instruction, pertinent products are carried out of a warehouse or the like through a product carry-out system 4, and the carried-out products are transported into a loading position to a final transport means 6 through an intermediate transport means 5. At this time, the product packing number of each product is read by a portable data processor 3 and judged on whether to coincide with a product packing number transmitted from the inventory control processor 2a of the inventory control device 2, and loading to the final transport means 6 is authorized.