Abstract: Building energy consumption accounts for a significant proportion of total social energy use, while traditional electrical control methods in buildings fail to meet the dual demands of energy efficiency and occupant comfort. To address this issue, this paper proposes an intelligent building electrical control system design method based on energy management. First, a zonal energy consumption-environment coupling model, an indoor state dynamics model, and a comfort penalty function are constructed to provide theoretical support for energy optimization. Then, a multi-objective optimization function and a hierarchical control strategy are designed to form a closed-loop system of "perception-prediction-optimization-execution-feedback". Finally, the proposed system is tested and verified in an office building within an industrial park. The results show that the design can effectively reduce energy consumption, improve operational stability, and significantly enhance economic performance while maintaining indoor comfort.