As the main link of smart city, the design quality of intelligent building is directly related to the development of smart city. Managers of construction enterprises should rationally utilize intelligent technology to promote sustainable development of enterprises. However, due to the short application time of intelligent technology in the construction industry， many links are not perfect, which leads to problems in many aspects, such as difficulty in system integration, difficulty in cross system coordinated operation, poor scalability and so on. It seriously hinders construction enterprises from realizing intelligent building system integration. Therefore, relevant enterprises should pay more attention to the design of intelligent buildings, and formulate reasonable intelligent building design schemes in combination with the actual situation of on-site construction to ensure that the design effect of intelligent buildings can meet the expected standards.