For the traditional way of power consumption

poor facts in energy waste and management style

an intelligent power-saving device was d esigned

which was based on ZigBee and ARM9.It took full advantage of the featu res of ZigBee network-low power

low complexity

low cost and two-way wireless communications.ARM9 microprocessor TQ2440 was used as control platform

CC2430 ZigBee as center node

sensors as control terminal.This device was used in sma rt home system.It can control household appliances switches remotely based on t wo-way communications;provide real-time electric price and power consumption information to electricity users

encourage the users to save electricity.Throu gh the statistics of users

it shows 2921.825 kW·h energy is transferred and 30 6.6 kW·h energy is saved every user in a year.The goal of energy saving is rea ched.