This study intends to improve current cataloging structure on Object-Oriented basis, and evaluate this in terms of effectiveness of using. From current cataloging structure, which based on unit record, this study extracted the elements related title, responsibility and subject. And designed it isolated object file from bibliographic substances and named it 3ObC(3 Object based Catalog). This study developed the physical scheme of Object-Oriented database, and proposed input and exchange format of 3ObC based Object-Oriented Catalog using XML. To evaluate usage satisfaction, this study made a comparative experiment about 2 MARC based systems. One of the controlled system is common MARC based system (MbCS), and another is extended MARC based system which is equipped with relation reference table device.(MbCSPlus)