TRADE MANAGEMENT METHOD, TRADE MANAGEMENT SYSTEM AND TRADE MANAGEMENT DEVICE

摘要

A product and the like can be managed after trading the product and the like to reduce trade risks. A trade management system includes a node having a calculating unit that performs, with transaction data issued by a predetermined node on an occasion of selling a predetermined product being set as a start point, processing for determining whether or not a commercial trade is valid on the basis of information on a trade condition of the product included in transaction data at the start point, and preliminarily held party-in-charge information relating to the party in charge when performing each processing of a series of commercial trades for repeating purchase and sale of the product.