A data information transaction method and system including receiving a query request that is sent by a terminal of a data requester and carries a query condition and a user characteristic identifier of a digital human that needs to meet the query condition, determining user characteristic information that is of a digital human and corresponding to the query condition and the user characteristic identifier, obtaining a query result, sending the query result to the terminal of the data requester, receiving a purchase request sent by the terminal of the data requester, and completing a transaction according to the purchase request.