In airport, there are many kinds of underground structures located, such as underground road, common curvert, drainage facilities and so on.
　These structures constitute network, and perform important activities in airport operation, as elements for lifeline facilities or transportation network to maintain the structure effectively or carry out the work on designing and construction effeciently, it is greatly required to store data on the structure. These data can be easily stored and accumulated in data base system. In particular, data of drawing or mapping on the structure should be stored effectively in the data base system, because these data are very useful for work on designing and construction.
　In this report, we would show the system on data base, hardware of the system is composed of micro computer, digitizer, and X.Y. plotter. User can easily operate the data base with interactive menu-driven methods.