A hot-press system for folding a surface of a pouch-type secondary battery, the hot-press system including: a first folded surface pressing unit configured to hold a main chamber and long-side terraces, which have folded surfaces, of a secondary battery, the first folded surface pressing unit being configured to primarily press the folded surfaces while applying heat and pressure to the folded surfaces, and a second folded surface pressing unit configured to hold the main chamber and the long-side terraces, which have the folded surfaces, of the secondary battery guided from the first folded surface pressing unit, the second folded surface pressing unit being configured to secondarily press the folded surfaces while applying heat and pressure to the folded surfaces.