The purpose of this study is to suggest more efficient modular units of the storage furniture system based on the two previous studies of the apartments storage furniture. This study is also to show the ways and means of making practical use of the results which come from the previous studies. The specific purpose of this study is, 1. To establish the modular furniture system minimizing the dead space, using investigation results of the bedroom size of existing apartments. 2. To establish the modular furniture system maximizing the storage space with utmost efficiency, based on the results of the actual storage condition from the previous research. 3. To suggest a case study of the different modular furniture system suiting 6 different bedroom sizes with the utmost efficiency, based on the results of above two purpose. On the bases of these research results, the design of various units of modular system furniture for bedrooms were suggested.