Beginning with the logical analysis of the development of Cloud Computing and the informatization of its value actualization, this paper points out that the evolution from the construction of "Private Clouds" to "Industry Clouds" and " Mixed Clouds" driven by the government is the basic path of localization of Cloud Computing in China. Through the analysis of the nature of the informatization of Cloud Computing and the meaning of "revolution" and reflection upon the practical prototype of "the Statistical Clouds", the paper elaborates that the innovation and change of information model is the basic logic of entry path for Cloud Computing. And also it points out the key for Cloud Computing entry path is the unification of information management system and the core is coordination between technical property and institutional characteristic but the corresponding standards and construction modes are essence connotation of Cloud Computing.