The museum's main building reuses the former Bank of Korea branch. Its official floor guide puts the Vault Art Museum in the former basement bank vault, a currency and bank archive on floor 1, and special exhibition space on floor 2. The third floor's 'Modern City Busan' gallery traces the port opening and city life; floor 4's 'Contemporary City Busan' covers liberation, industrialization and democratization. A mid-second-floor children's 'Deullak Nallak' area has separate advance booking. Plan the history exhibits around any children's appointment.