I. Introduction
The computer science not only affects our daily lives, but also changes the traditional architectural design method in many aspects [1]. Particularly, the Virtual Reality technology (denoted as VR), which is regarded as one of technologies which are most possible to change the world in the 21th century [2] [3]. The technique of virtual reality (VR) has become one of the most important and inventive technologies in the 21th century, together with Internet and multimedia technology, and virtual reality technology has been developed for more than 20 years [4]. Particularly, VR refers to a type of synthetic integration technique, which combines computer graphics, computer human interaction, sensor technique, artificial intelligence, robot technique, and so on [5].