Daeungjeon Hall of Unsusa Temple is a three-kan (one kan being a unit of measurement of the space between two columns) by three-kan neat building with a gable roof and column-top bracket sets, as well as various details that reflect the local architectural heritage. Although certain details of the original building were changed during the renovation of its windows, ceiling, and dancheong (decorative color patterns), the structures originally built in 1655 and renovated in 1771 are still preserved today. The hall also bears an ink inscription of its chronology, which reveals it to be the oldest wooden structure remaining in the Busan area, and provides valuable clues about the changes made to Buddhist altars during the Joseon period (1392-1910).