In the light of too much dispersed information resources caused inconvenient management and complicated operation in water conservancy, we design and develop a compositive information portal. First, we introduce the design idea and the architecture of the systems. Then, we give a detailed exposition on various functional modules. Through the integration of instant communication resources, business application resources and user system of business application resource, the portal realizes the unified management of the resources, the message and the identity authentication and single sign on. Meanwhile, the portal realizes publishing service on-demand according to the department or position. The actual application results show that the portal can solve the problem of resource application, make use of resources more simple and convenient and make the work of the user more pleasant and efficient.