With the development of globalization and informatization, the global strategic power has been forming a new power structure within the infosphere, the nodes of which are commanding high grounds-that are cities with abundant information infrastructure and prominent advantages in the access to information. Since the rule of world competitions has largely ceased to be a force-to-force experience and the significance of information is well realized in modern activities, it has been theorised that in such information era,the evaluation of the cities' potential is becoming more relevant to the informatization construction. From the perspective of the theory of information power, more emphasis should be laid on the strength of cities' information power, which represents the potential of a city, for its economical and social development. Correspondingly, the critical objective of promoting smart cities is to reinforce their competitive power, in the form of information power campaign. Thus, this thesis defines information power with three indexes, including the manufacture, acquisition and the control of information, and pick up 23 smart cities in China to measure their strength. The paper points out that there is a vast difference among cities in China when it comes to the field of information power, manifesting an uneven development pattern. In addition, the result presents an intriguing outcome when the ranking of information power and competitive power are put together for reference, and therefore, this thesis brings forward a series of development strategies on different emphases,aiming at cities which have a big gap between these two forms of power.