To perform cargo collecting work while saving labor and improving efficiency and accepting accuracy.

Automated work is performed in processes after measuring collected cargoes but before price computation by executing a step of using a cargo collecting truck on which a weighing function part 4 and a price computing function part 8 are mounted for measuring at least one of the weight and size of the collected cargoes, a step of inputting information for the collected cargoes, a step of operating information regarding service to be applied to the collected cargoes from an information group regarding service related to the collected cargoes in accordance with the information for at least one of the weight and size of the collected cargoes and information for the collected cargoes, and a step of presenting information required for the collected cargoes.