Research on the city networks

The urban systems of the 20th century are from dense centers into a network, which have highly variable nodes and connections. Network city method are analyze briefly. First, transdisciplinary methods such as morphology and physiology are adopted to study the new urbanity phenomenon and then dynamically evaluated by four criteria of urban quality. It is good for optimizing the existing city structure and improving urban qualities. It creates a new megalopolis design method. Important developing directions of urban network research in China are put forward finally.