At present, the construction of smart city has become the important choice of urban innovation and development in urban planning. In addition, intelligent urbanism that wants to achieve a convivial purpose must offer institutional choices to support a life of action and technologies that serve individuals themselves. This paper summarizes the definition and main content of the smart city, then from Benninger's Principles of Intelligent Urbanism (PIU) theory of environmental sustainability, appropriate technology, heritage conservation, infrastructure efficiency, social access, place making, transit oriented development, regional integration, institutional integrity, human scale, constructs a set of strategies and framework of smart city in the national spatial planning, with the characteristics of objectivity, clear orientation and justifiability, to provide a useful reference for the convivial and rapid development of smart cities.