This study is to suggest the bibliographic description of RDA & KCR4 cataloging rules for FRBRizing the aggregates based on aggregates modeling. It is to suggest bibliographic description of RDA & KCR4 cataloging rules of aggregates through analyzing FRBR and LRM aggregates modeling and comparing RDA and KCR4 cataloging rules about aggregates. First, it is to describe the bibliographic records based on object oriented model, and to describe both aggregates works and separate works appropriately. Second, in case of aggregates by one person, family, or corporate body, collective title as aggregates work and separate works in aggregates must be regulated in RDA. In KCR4, collective titles rules should be regulated for aggregate works and separate works should be described. Third, aggregates of works by different persons, families, or corporate bodies should be accessible by aggregates work and separate works, and aggregates of works by different persons, families, or corporate bodies without collective title should be accessible by each of the works in both RDA and KCR4. Fourth, augmentation aggregates could be accessible by main work's expression, the expression of aggregates work, and separate expressions of the augmentation. This study will contribute to FRBRize the aggregates by suggesting bibliographic description of RDA & KCR4 cataloging rules.