To provide a manufacturing device and a manufacturing method for molten materials, excellent in suppression of emission of carbon dioxide and heat efficiency.

This manufacturing device 1 and the like for molten materials has a burner 3 for melting a supplied material R by bringing the flame generated by combustion of oxyhydrogen OH into contact with the material. As oxyhydrogen OH can locally generate high temperatures as high as 2,000°C, the material R can be quickly molten by bringing the high-temperature flame into contact with the supplied material R. As fossil fuel is not used in melting the material R, carbon dioxide does not generate, and emission of carbon dioxide can be suppressed. A burner 3 is disposed in an electromagnetic induction heating furnace 2 to melt the material R heated by the heating furnace 2 by bringing the flame from the burner 3 into contact with the material R. This device may have power generators 10, 11, 16 generating power using an exhaust gas G2 from the melt manufacturing device 1, and using the generated power in heating in the electromagnetic induction heating furnace 2 or/and manufacturing of oxyhydrogen OH burned with the burner 3.