Not long ago, the Ministry of Housing and Urban-Rural Development listed 24 cities, including Beijing, Tianjin, Chongqing, and Xiong'an New Area in Hebei Province, as smart construction pilot cities, with a pilot period of 3 years. What is intelligent construction? What role can intelligent construction play in the development of construction industry and even smart cities in the future? What bottlenecks need to be broken in the development of intelligent construction? For the construction industry, intelligent construction refers to making full use of intelligent technology and related technologies in the construction process, improving the intelligent level of construction and reducing the dependence on labor in the construction process through the application of intelligent systems, so as to improve the quality and efficiency of construction, and at the same time, achieving the goal of saving materials and labor, energy saving and carbon reduction in the whole life cycle of the building. It is not difficult to see that intelligent construction will promote the transformation and upgrading of traditional construction industry. Ding Lieyun, academician of the CAE Member and former president of Huazhong University of Science and Technology, elaborated on the five major changes brought by intelligent construction to the construction industry. First, product form digitization. Including the digitalization of architectural design, construction process and digital delivery. The current development trend of architectural digitalization is the wide application of building intelligent terminals. The second is the service of business philosophy. Provide professional services such as design service platform, engineering machinery service and intelligent construction site during the construction process, and provide professional services such as building energy network, intelligent elderly care property and healthy housing during the construction use process. The third is the platform-based business model. By 2025, a construction industry internet platform integrating human, machine, material and finance will be built. Fourth, industrialization of construction methods. From factory manufacturing to intelligent logistics to site assembly, realize the integration, automation and intelligent development of manufacturing and construction. Fifth, the modernization of industrial governance. Build an open big data cloud platform for the construction industry, and realize the modern management mode of symbiotic governance between the government and the public. The intelligent construction of a city is reflected in the whole life cycle of urban construction, including three modules: intelligent planning and design, intelligent equipment and construction, and intelligent implementation, covering the whole process of research, planning, production, installation, operation and maintenance, and demolition. Song Bing, vice president of the Construction Industrialization Branch of the Institute of Architectural Design and Research of Tsinghua University, said that intelligence must be built on the basis of industrialization and digitalization, on the basis of high industrialization, with digitalization as the means and building networking as the platform, in order to complete the intelligent transformation of the construction industry. Qin Zhanxue, president of China Building Materials Circulation Association, said that intelligent construction is the basis for realizing smart cities in the future. The digital transformation of construction and building materials industry is an inevitable trend, which will also be reflected in the whole industrial chain of construction and home furnishing. In today's era of accelerating the intelligent transformation of traditional industries, how can the construction industry, which used to rely on "moving bricks, binding steel bars, pouring concrete, and installing formwork", achieve intelligence? To develop intelligent construction, we must first solve the cognitive problem of the construction industry. Song Bing stressed that there is a certain deviation in the recognition of digitalization in the industry, and generally equates digitalization with modeling. Some experts said that the construction mode should be promoted from the traditional "trial and error method" to the "simulation optimization method" based on digital simulation, and a new production mode of rapid iteration, continuous optimization and data-driven construction industrialization should be constructed. At the same time, with the help of the building Internet, build the building in a modular way