This paper is aimed to prose a welding information system which is usable for ship design and production processes. For this work, the welding information related to shipbuilding is analyzed systematically. Database system and object-oriented paradigm are integrated to describe the welding information model of ship structure. Event-driven programming technique and graphical user interface are used to provide the richer interactive environment and the flexibility for the application. Test program is developed to verify the consistency of the created model and to see the effectiveness of the used programming technique.