This paper，based on the report “The Rise of Innovation Districts：A New Geography of Innovation in America Strategy” issued by Brookings Institution，tried to capture this emerging trend of Innovation Districts. It explored the large forces and local practices and practitioners that are driving innovation and provide initial guidance to U.S. city and metropolitan leaders on how best to recognize and extend the growth of their own innovation districts. The paper analyzed the multiple assets of innovation districts，and provided real-world guidance and insights for cities trying to start or extend this model in their own communities.