The purpose of this study is to analyze and identify the characteristics in the current library classification research, and to provide suggestions for the future in this area. This study covers the published studies in library classification from 2004 to 2013. They include the research on Korean Decimal Classification (KDC), Dewey Decimal Classification and others. The results show that the main purpose in those studies is to improve current KDC system. A suggestion is provided in this study to concentrate on specific classification systems for school libraries and small libraries, for digital collections.