Abstract :
UML is an important application of Object-Oriented technology, and is also a useful object analyzing and designing tool in modern software engineering. In order to achieve query functions of a subterranean tube net system, total design has been done in this paper. Function requirement, static and dynamic model of the system has been analyzed deeply by UML technology. Where function requirement of system has been described by use case diagram, object-classes and their relation of system have been depicted by object-class diagram and dynamic model of tube data management has been established using sequence diagram.