A thermal waste recycling system and method and to the application thereof in the treatment of high-water-content waste includes: a column for thermal waste pyrolysis, a thermal pyrolysis gas combustion chamber, a thermal purification and molecular cracking device, a heat exchange device comprising a condensation device and an element-concentration device, a device for the condensation of carbonic gas CO.sub.2, a device for cooling the hot parts of the system, and a cogeneration installation.