Provided is a product information generation system and the like capable of performing comprehensive determination using information on access to a plurality of pieces of media data from media data representing a product and generating product information. A product information generation system including a storage unit that stores access information used for access to product media data representing a product from a plurality of terminal devices in association with the product media data, a communication unit that receives the product media data transmitted from one terminal device, a feature extraction unit that extracts a feature of the received product media data, a similar media acquisition unit that acquires similar product media data of which a degree of similarity to the received product media data is equal to or higher than a predetermined degree of similarity and the access information associated with the similar product media data from the storage unit on the basis of the extracted feature, and an information generation unit that merges a plurality of pieces of access information of the acquired similar product media data to generate product information indicating the product of the received product media data.