Abstract: EPN database management system, the subsystem of the terminal system, was checked and well appraised by China Oil & Gas Pipeline Bureau. Having such characteristics as menu display, data updating and printing, the system can print out the data dynamically as well as process all kinds of data from the pipeline easily and quickly. Introduced in this paper are the relations between static and dynamic database, setting up of passward database, dynamic changes of secondary passward, random updating of data, and realization of printing.