Abstract: With the rapid development of intelligent buildings, building automation systems (BAS) have higher requirements for the reliability, energy efficiency, and intelligence of electrical equipment. This paper focuses on the application and innovation of intelligent switchgear technology in BAS. By analyzing the limitations of traditional switchgear in building power distribution and security scenarios, an intelligent transformation scheme based on multi-sensor fusion and deep learning is proposed. The research covers the design of intelligent perception layer, data-driven fault diagnosis model, energy efficiency optimization algorithm, and self-healing control strategy, with verification through actual building cases. Results show that intelligent switchgear can improve the fault response speed of building power distribution systems by over 60%, increase comprehensive energy efficiency by 15%, and reduce operation and maintenance costs by 40%, providing technical support for the efficient operation of BAS.