Urban form analysis is an important task in the field of urban planning. This chapter depicts the process of constructing a virtual Beijing with three-dimensional simulation for implementing urban planning digitally. The inner City of Beijing was selected as the subject matter for exploration, and the Xidan Business District area was the focus for studies on the urban form. This article briefly descries the modeling process and the feasibility, usability, and the applicability of the digital city for future research. Therefore, a new research frontier of "transparently visualizing the digital urban ordinances" is created.