CASH PAYMENT LINKING METHOD USING ACCUMULATION OF DOUBLE SALES MARGIN, AND LINKING SYSTEM THEREOF

Disclosed are a double deozoom margin management method and a system for performing the same, which increase mutual sales among a corresponding business owner's own business and rival businesses or among heterogeneous businesses via cross promotion and sales support among heterogeneous businesses or homogeneous businesses. The double deozoom margin management system includes a web server, a deozoom margin accumulation server, and a purchase service provision server. The deozoom margin accumulation server enables deozoom margins to be accumulated among deozoom designated shops. The purchase service provision server: (i) identifies an identification code of a corresponding designated shop when a general purchase has been requested; (ii) issues and accumulates a previously agreed deozoom margin; (iii), stores a deozoom margin of a purchaser and also stores a deozoom margin for settlement when an offline purchase via a point card has been requested; and (iv) does subtraction from a deozoom margin of a member.