Abstract
This study was intended to derive architectural characteristics which constitutes mutual complementarities from the viewpoint of modern architecture, where the aesthetics of the East and the West are merged, by extracting aesthetic elements of the East and the West expressed through the time and space of Ieoh Ming Pei's architecture. The complementarities of aesthetic thoughts of the East and the West expressed in Ieoh Ming Pei's architectural language was derived sequentially in order of 'the temporality by the variability' in 1970s, 'the circulation by the repeatability' in the mid-1980s, 'the monument by eco-friendly' from the late-1980s to mid-1990s and 'The abstractness of the traditional beauty by the recovery of relationship with the periphery' from the late-1990s to 2000s These complementarities are the chronological and spatial characteristics of architecture which surpasses the existing individual aesthetic recognition of the East and the West, in that the thoughts of the East and the West are coexistence in modern architecture. Accordingly it was confirmed that the aesthetic conflicts between the background emotion of the thoughts of the East where Pei was born and raised and the western architecture is not the conflict between aesthetics of the East and the West, but mutual complementary value.