The emergence of intelligent building is an important event in the history of architecture, which plays a positive role in promoting the development of architectural functions. In China, the development of intelligent building has lasted for nearly 30 years, and the intelligent building technology has made great progress. From the traditional automation control technology to today's Internet of things, sensors, the Internet, 5g communication and other technologies, the intelligent building technology has gradually extended and expanded, becomes a more intelligent existence, and helps the digital empowerment of China's infrastructure construction.