The present invention relates to an e-commerce method capable of integrated ordering and integrated shipment to help a user residing abroad to use a domestic online shopping mall, the e-commerce method including displaying a plurality of online shopping malls on a user terminal, displaying an integrated order product list for a plurality of products selected by a user's input from at least one online shopping mall on the user terminal, receiving a purchase-on-behalf request event for a product of the integrated order product list from the user terminal, receiving first-shipment completion information from an administrator when the first shipment of the product purchased on behalf of the user to a predetermined shipment destination is completed, and displaying an integrated shipping method list including a plurality of shipping methods corresponding to the product for the second shipment of the product to a user shipment destination on the user terminal.