The three-dimensional digital construction scene is used to simulate and feel the urban living environment construction, recreating the future urban design from multiple perspectives with authenticity, which not only saves the manpower, but also effectively improve the accuracy of the urban planning compared with the traditional drawing submissions. In this paper, a three-dimensional digitized urban roaming system is designed to integrate real-time interaction and virtual experience, so that the urban planning departments can complete urban construction planning through virtual experience. According to the three-dimensional digitized city design, the harmony between human and urban environment can be achieved, bringing the living experience of urban roaming to human beings in virtual environment.