This paper, Construction of green and smart city in Chengdu--Based on the experience of Pusan City combines the similarities between Chengdu and Busan city in South Korea, and uses the experience of Busan city for reference to explore a green and smart city road in Chengdu. That is to build a city space model with high quality of life, use comprehensive land use to make the city full of vitality, improve urban humanity, build a digital city, and finally plan to build a zero energy consumption city, so that the architecture can be integrated into urban development for a long time.