A controller of virtual studio three-dimensional real-time rendering engine is proposed in this paper, and the research focuses on the architecture, communication method and control protocol.The virtual studio three-dimensional real-time rendering engine is the core technology of virtual studio.It is different with the general three-dimensional rendering engines in the rendering function and especially in the design of controller for virtual studio application.The architecture design of the controller meets the demands of virtual studio, which is a control command transfer from the controller to the rendering module.The communication method is designed to be a protocol driven TCP communication method.It not only ensures the real-time feature of rendering, but also guarantees the scalability of control protocol, which will facilitate the follow-up research and the application development.