The planning of smart cities is constantly progressing due to the innovation of information technology. The goal of progress is to use information and information communication technology to improve the economic and environmental performance of cities, while hoping to provide residents with a better quality of life. Smart city planning has a combination of residents' life, built environment, and technological innovation. A smart city is a smart "complex adaptive system" with complexity, nonlinearity, and rapid change, and it is planned with complexity theory and communication theory.