To provide a quenching device or the like for a melt capable of effectively using heat belonging to the melt product, automatically crushing a quenched object after quenching, and not requiring even water treatment accompanied by quenching.

The quenching device 1 or the like is equipped with a pipe line 3 with one end 3a blocked and the other end opened, and a nozzle 4 inserted into the blocked end of the pipe line 3. The melt product M is supplied to the blocked end, a hydrous object W is jetted on the melt product M from the nozzle 4 while cooling the melt product M, the melt product M is moved to a blocked end side and the quenched object P is crushed by rupture due to the evaporation of water contained in the hydrous object W. A steam recovery device 8 recovering steam S produced by the rupture of the hydrous object W can be arranged, and the steam S can be used in drying and/or preheating or the like of a raw material for obtaining the melt product M.