Intelligent building is a high-tech building based on modern communication technology, big data, virtual reality, neural network and so on. The common intelligent building, security system, air conditioning system， fire fighting system, video surveillance and even smart home make the level of science and technology of intelligent building improve continuously. This paper mainly discusses the integrated wiring technology of intelligent building from the aspects of the composition of intelligent building cabling system, the design of intelligent building cabling system, system safety measures and construction, etc. As a necessary project of intelligent building, it is of great significance to the stable operation of intelligent building.