Aiming at existing exhibitions, informationized management system can only meet the requirement of monomer exhibition management, but which cannot meet the needs of management chain and integration of resources of a large number of exhibitions together. For the traditional B2B e-commerce only provides a platform of exchanging information and communication for the supplier and requisitioning party, we design a SAAS-based management platform to build management of all the management works of an amount of actual exhibitions, as well as the use of rich media technology for Webcast and interactive of activities of the exhibition, and reduction of management costs in all of the procedures, which builds virtual year-round exhibitions online, based on the exhibition system and huge B2B resources to realize the target of constructing a B2B e-commerce platform which keeps a complementary and coexistence of online-operating and virtual year-round exhibitions, and more operational efficiency as well.