An information processing method to be executed by a processor included in an information processing device, the information processing method includes receiving a plurality of requests for constituent elements including a hardware and a software from a plurality of terminal devices; determining, among the plurality of requests, a pair of requests which is different from each other, a similarity of the pair of requests being a level more than a predetermined threshold; selecting terminal devices corresponding the pair of requests; setting a common request including a common element requested by at least two of the selected terminal devices, the common request being different from each of the pair of requests, the common request being different from each of the pair of requests; transmitting the common request and cost information to the selected terminal devices, the cost information being cheaper than each of the pair of requests.