The remote virtual design system based on B/S framework is investigated in the paper. On reviewing the current virtual design system situation, the control system dynamics simulation is integrated into the virtual design system of roller gear cam mechanism. Simulink and Matlabserver are employed to realize the dynamics simulation for the system, and COM and VRML technologies are used to browse the virtual model on the network platform. The prototype system indicates that the system can serve as an effective tool for designing roller gear cam mechanism with the better properties of interactive dynamics performance design and expansion usage.