disclosed are a transaction method , and a transaction system and device . the method comprises : an online store server managing information about physical stores , accepting the login of a user terminal , querying information about physical stores which have corresponding commodities according to a selected commodity list submitted by the user terminal , selecting therefrom a suitable physical store for the user terminal in accordance with a screening policy , and sending the name and position information about the selected physical store to the user terminal ; the user terminal reporting the commodity list to a physical store terminal of the physical store selected by the online store server , and the physical store terminal querying position information about a corresponding commodity according to the commodity list reported by the user terminal , and feeding back same to the user terminal ; and the user terminal searching for a corresponding commodity in a corresponding physical store according to the position information about the commodity , and completing commodity payment through interaction with the online store server or the physical store terminal . the present invention can carry out querying and selection of mass commodity information , and can greatly improve the shopping experience of a user and ensure shopping quality .