Abstract: With the advancement of science and technology, the intelligent control system for building electrical engineering has gradually become a core component of building intellectualization. As the core of the system, the central control host coordinates various functional modules to manage terminal electrical equipment accurately and efficiently, thereby improving the operational efficiency, reliability and energy-saving performance of the entire system. Taking a large-scale cultural tourism theater project and a conference system project of an office building as research cases, this paper deeply explores the application of the central control host in the intelligent control system for building electrical engineering, aiming to provide valuable references for engineering practice and technical research in related fields.