An online integrated shopping mall service system registers manufacturing/enterprises, SOHO distribution enterprises, and SOHO trade enterprises as enterprise members, provides the shopping mall with commodities, sells the commodities, and manages the sales record of the commodities. If a member is a shopping-mall founder, a sideline-person, a SOHO distribution enterprise, or a SOHO trade enterprise, the system assigns a free retail-client shopping mall to the member, such that the member sells commodities at retail in the client shopping mall, performs the shopping mall management, registers commodities as regular commodities to be sold in the client shopping mall, and assigns lower client shopping malls to others. The system assigns a specific administrator who satisfies a predetermined condition to a wholesale-qualified member capable of managing the wholesale shopping mall, assigns the wholesale shopping mall to the qualified member, and sells the commodities at wholesale.