We investigate human perception principles in immersive virtual environments, study fundamental theory aboutthe consistencebetween virtual and physical  worlds. We perform research on virtual reality core technologies such as virtual environment construction, rendering, display and human-computer interaction, and augmented reality. By integrating our research fruits, we have been developing the virtual/mixed reality supporting platform to facilitate application development in the fields including cultural and creative industries, entertainment, smart city, national security, equipment manufacture, etc. The recent research and development are focused on the following directions：Virtual environment construction, rendering and display, Natural human-computer interaction,Augmented reality,Virtual reality applications