For the trend of the internet and information technology development, the enterprise put in a great deal of equipments and a system, its main purpose is to improve the operation procedure of enterprise and enhance the competition ability of the enterprise. However the inner part of the enterprise makes use of the variety of system, platform, database and application etc. Now the enterprise faces new challenge, how to integrate and apply the information flow, it is become a new thinking direction of the enterprise. Therefore the enterprise information portal comes with the tide of trend. This research provides a method for constructing and evaluating the enterprise information portal, which is based on the theory of the Balanced Scorecard. The proposed methodology is validated by two real-world cases.