The intelligent construction of building electrical equipment installation has been continuously improved. In this paper, the structure and composition of the electrical system of intelligent buildings, the preparatory work, the wiring laying and the distribution installation are discussed as the installation focus. Then, it studies the intelligent installation of building electrical equipment for an engineering example. This paper mainly expounds the installation quality control points of the security system, communication network system, lightning protection and grounding system, monitoring and control system in the installation of building electrical equipment, and further promotes the application of personalized building functions, in order to provide reference for subsequent related projects.