The Olympic Gymnastic Arena, which will reform into a new K-Pop Performance Arena, is planned to preserve and maintain most of its existing building’s exterior and structure. It is planned to preserve the gymnasium’s historical meaning, create a new image, hold its historicity and symbolism, minimize construction scope of elimination and reconstruction, and enable practical, efficient, and safe facility improvement. This will enable construction on various concert facilities of possible second stage expansions and respond to increase in concert demands. By using the changing roof structure, the interior/exterior area formed by the eaves space and corridor is planned following the building’s exterior. This fulfills insufficient pre-function areas, and ultimate roof structure for various concert forms. Through this, the arena will become a public area of special events, history, culture, and experience.