According to the general planning requirements of Outside Management Center (OMC for short) of Hongqiao Airport and on the basis of water management business description, this paper divides three levels for the water information system management structure, designs the overall structure of the water information system, analyses the function of the system structure, and then applies the data mining technology in the layer of water management decision, finally gives data levels of data mining system. This project can provide reference and help to related Chinese airport’s planning and construction projects.