With the vigorous development of virtual reality technology, the research of virtual camera system has been placed more and more attention. Making television programs and film special effects embark on an unprecedented new level, because of using the virtual camera system. However, in the study and use of virtual camera system, the actual situation of the synchronization camera motion attitude is a key issue to resolve, namely the MEMS sensor will generate noise in the measurement process, and it is necessary to improve the accuracy. In order to resolve the problem, a real-time virtual camera system that based on Unity3D and using C#. The system focuses on the technology of synchronous fusion that basedon the posture of entitative camera and virtual camera. In order to reduce noise, Kalman filtering technique is used to filter the sensor data. The result shows that the virtual camera's synchronized movement can meet the needs of TV recording and film special effects in this virtual camera system.