Abstract: The management of information has become more and more complicated as the increase of amount of information,especially for the increase of Email.In order to actualize the balance of information increasing and memory cost,enterprises need to implement information lifecycle management.This paper depicts the change of the information value with time change through their changing curve,and applies the method of 6C index system to judge the effect of the application of information lifecycle management (6C is the 6 essential factors of carrying out information lifecycle management,including Classification and Policy Service,Consolidation,Continuity,Comprehensive Backup Recovery and Architecture,Compliance,Content Management).This paper concludes that enterprises can reduce the cost of information management as the result of information lifecycle management,and effectively reduce the complexity of management as well.