A graphical user interface is employed for generating an object-oriented database (ODB) application. An application information extraction unit extracts application information in response to a screen operation by a user on an actual screen in which links are expanded. A query language generation unit generates a query language including an operation for pursuing the link between objects in correspondence with the extracted application information, and it issues the generated query language to an ODB management system. A retrieval result display control unit receives a retrieved result in the ODB from the ODBMS, and it updates the link-expanding actual screen. A link meta-information management unit registers and manages the query languages which the query language generation unit has generated in correspondence with the screen operations instructed by the user to be registered, as link meta-information which corresponds to the database application indicated by the user. An application execution unit executes the application and displays a user's utilization screen on the basis of the link meta-information.