Nowadays, low-carbon life and low energy consumption are popular topics as more and more people are looking for "green transport". With the rapid development of wireless communication technology and the widespread adoption of vehicles in daily life, Vehicular ad hoc Network (VANET), as a new research hot spot, has attracted much attention. This paper proposes a new method to analyze VANET and explain network behavior with its physical meaning. Firstly, this paper models the VANET based on the topology characteristics which will be analyzed based on the real data collected by more than 4 000 taxis in Shanghai. The topology characteristics include degree distribution, clustering coefficient, characteristic path length and so on. The statistical analyses show the degree distribution follows the power law which is the classic characteristics of scale-free network in complex networks. It also reveals high clustering coefficient of VANET. Through combining the complex network theory and applying the small world model and scale free model, The paper builds a VANET model and create external interface to control the network. The simulations prove the effectiveness of our model, which helps us to build capable simulation platform of VANET with better network control.