As an urban development model that deeply integrates information technology with various economic and social fields，Intelligent City has become an inevitable trend of modern urban development. This report builds an evaluation index system for China’s intelligent cities from four dimensions：urban infrastructure intelligence，urban governance intelligence，urban economic intelligence，and urban life intelligence. Through the principal component analysis method，the intelligent development level and law of 70 large and medium-sized cities in China are evaluated and summarized. The result shows that the level of urban intelligence in China is unbalanced among different regions，and there are obvious differences in the dimensions of urban intelligence development between central cities and peripheral cities，eastern regions and central and western regions. Based on the analysis of the current situation of China’s smart city development，this report puts forward detailed policy recommendations for the problems existing in China’s urban intelligent construction，hoping to provide experience and useful reference for China’s intelligent city construction.