Abstract: With the continuous development of information techonology,energy cost of information industry is becoming more and more important in whole energy saving and emission reduction． This paper put forword the concept of green computing and green network,analysed the method and possibility of energy saving in various network device,proposed the function of energy management which should be added in network management．A plan and relevant management information was given for monitor,control,and statistic of energy cost．Thus it can be monitored and controlled quantificationally,and comprehensive monitor and management can be provided for green network．

Key words: Network management,Green network,Energy management,Emission reduction