We developed a browsing system for various terminological systems. Our system can support to create a new terminological system, using terms with hierarchical relationship picked up from existent terminological systems. A user can grasp the hierarchical relationships between selected terms intuitively, since our system illustrates the structure in clickable map form, HTML form, etc. Our system also integrates the terms with hierarchical relationships selected from several terminological systems, and displays the terms and relationships among them, therefore a user can grasp the structure and can collect the vocabularies suitable for the new terminological system for him/her to create. Moreover, our system provides reusable terminological data written in XML (Extensible Markup Language). Our system is successfully applied to five terminological systems which differ from each other in their fields or scales. Looking at the structuer of several terminological systems, a user of our system can browse the integrated result of one or more terminological systems in arbitrary combination, and can also acquire the displayed data as the XML form, and can reuse it for his/her task. These results indicate effectiveness and usefulness of our system.