This paper proposes a new online exhibition system design and development approach. It takes advantages of Web 2.0 technology. The exhibitors can create the contents by themselves with a user-friendly interface. It helps to release the exhibition organizers' workload. The system also provides functions to facilitate the interactive communication between exhibitors and visitors. The detailed design principles are presented in this paper. Assessments are conducted at the end of the system development. Promising comments are received from the exhibition industry practitioner.