To provide an oxygen free carbonization system for avoiding generation of dioxin, and reusing resultant products.

This oxygen free carbonization system has a low temperature carbonization device 20 for primarily incinerating an incineration object at 30 °C to 600 °C in an oxygen free state, and a microwave carbonization device 40 for secondarily incinerating the incineration object primarily incinerated at 600 °C to 2,000 °C in the oxygen free state. The microwave carbonization device has a cylindrical external body 42, and a cylindrical internal body 48 rotatably arranged inside the external body coaxially with the external body. The external body is provided with a plurality of microwave generators 46, and the internal body is constituted so as to rotate around the longitudinal directional axis Y as the center. A ceramic layer 56 is arranged on an inner surface of the internal body, and a titanium layer 58 is arranged inside the ceramic layer.