Because the 3D sights is very complex, it is difficult to realize the simulation and visualization of 3D sights on internet. We design and develop a system of B/S architecture for interactively browsing the 3D sights on the Web. To support the simulation of 3D sights with high performance, an extended-relational logical model of 3D sights is designed, based on this model, the sights data can be organized and managed effectively by Oracle spatial. In addition, a specification for transporting sights data between Web server and browser is defined with XML, Additionally, an effective strategy for sights data schedule is designed to support the real-time rendering of 3D sights. With our system, user can interactively browse complex 3D sights on the node of internet.