Soft system Method (SSM) is an effectine way of a system analysis and a powerful means of dealing with the active system of mankind. By discussmg some problems related to the information system development methods that are offen used in the actual application. and trymg to apply the 80ft system method to the information system development. this paper puts forward the grafting model of the soft system and life cycle and discusses the application of grafting model in an actual pro]ect.