ZigBee is the latest wireless technology which provides three lowest solutions, low data rate, low power consumption and low cost. One of the ultimate goals of ZigBee is to provide a energy saving solution. Low power consumption and power management are important characteristics of ZigBee. To explore the concept of energy saving, an integrated ZigBee automation system (ZAS) for lighting automation and power management is investigated. In this paper, the details of system design for ZAS are described including the system overview, deployment as well as the power management algorithms.