A server for providing an on / off line marketing service according to the present invention includes a merchandise sales terminal, a general PC, a server communication unit connected to the portable terminal through a wire / wireless network, A server for inputting and outputting product registration information for various products registered on a commodity trading terminal or being an object of a transaction on the basis of a connection through a wire / wireless network, displaying a virtual trading space for sale of the commodities, A server user interface unit for inputting and outputting a command for the sale of the goods through the server; A database storing the product registration information and storing user registration information including the portable terminal number and the social network address information of each of the seller and the buyer for the sale of the goods; A server settlement processing unit for performing settlement processing based on the sale of the goods; And a server control unit for controlling execution of the sale of the goods through the virtual trading space.
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