This study focuses on window patterns of Hanok, Korean traditional residence, and their effects on building performance and adaptabilities as building skins. The purpose of this study is to investigate the possibility of Hanok patterns as a new type of building envelope that satisfy both aesthetic and the efficiency of building space, and to suggest a new method based on Information and Communication Technology (ICT) for optimizing the building performance. For this research, a variety of Korean traditional window patterns were reviewed first, and a typical fa?ade was applied for a comparative analysis in aspect of the effect on the building indoor environment. In addition, this study examines selected window patterns that could minimize heat loss and make it easy to adjust indoor lights with an embedded control system called Wireless Smart Sensor Network (WSSN). In conclusion, it is turned that ICT has played an important role as both a controller for the spatial environment and a simulator for evaluating various building factors such as envelope systems.