To provide an information service providing method for commodities capable of promoting the continuous purchase of commodities to be repeatedly purchased.

This method comprises a step for receiving identification information transmitted from an unregistered person who wants to be provided an information service who acquires a commodity added with identification information through a communication network, and for collating the identification information with identification information for collation, a step for registering the identification information in a registration information storage area by associating it with the registration information of the unregistered person who wants to be provided the information service when the collated identification information is correct, and for associating permission information valid within an allowable period based on the standard use period of the commodity with the identification information, and for transmitting it through the communication network to the already registered person who wants to be provided the information service, and a step for providing the information service through the communication network to the already registered person who wants to be provided with the information service.