It is obviously true that the aspects of interior designs in current use have been combined with changing trends and developed and handed down throughout centuries. An examination of respective characteristics of spaces where Korean presidents have lived during their terms of office could get a useful clue by which both traces of Korean modernism and senses of modeling can be perceived. However, there are not enough literatures that can be verified. Therefore, it would be especially meaningful to find out and analyze documents unearthed. The purpose of this study is to consider the expressiveness of interior designs of presidential residence and office which have been combined with changing trends and developed, while classifying respective cases during presidential tenure by periods of Joseon Government general, U. S military administration, the first Republic, the second Republic, the third and the fourth Republic, the fifth Republic, and the sixth Republic, examining relevant literatures, photos, drawings and making on-the-spot survey. The study is also intended to get a better understanding of the aspects and the features of interior designs shown in presidential residences and offices that are not so much made known due to uneasy access to archives and to document the resources buried in oblivion and to consider the historical meanings.