In the strategic context of enterprise information technology, a reasonable and scientific assessment of the enterprise value-added has become the key issue of the enterprise development. Taking the cooperative effect as the core,the implementation of enterprise information changes the value of the enterprise system to a certain extent. From the perspective of the value chain, information-based business-to-business value mainly lies in the impact which come from the value chain nodes，such as，the enterprise itself, the suppliers, the customers, the competitors, the service provider, and thus to bring the value of the enterprise value-added . As a result, based on enterprise information and value chain theory,this paper proposes that the value of enterprise informationization can be designed as the core value,delivered value, customer value, comparative value and additional value in five aspects.According to data analysis by Structural Equation Modeling,this paper constructs the value system of enterprise based on the impact of enterprise informationization.