Based on analyzing and summarizing the development history of China's government micro-blog, and system analysis of the relative conceptions and their connections, this research puts forward an evaluation index system of interactive degree of government and citizen in government micro-blog. Through the case study of the sample government micro-blog in Chongqing, this research has proved the practicality and reliability of this index system. It will provide scientific theoretical foundation for the practical application and evaluation of the government micro-blog, and bring into full interactivity of it.