The present invention that the temperature or flow rate of the source of gas to be directed to a system that processes oxidize the noxious gas containing the volatile organic compounds, and includes a more specifically combustion oxidation unit, a catalytic oxidation unit and the heat exchanger, and further parts of the heat exchange flows by providing a regulating unit for controlling in accordance with the present invention relates to a hybrid-type thermal oxidation catalyst system that can quickly and efficiently process the harmful gas. Hybrid catalytic thermal oxidation system according to the present invention, the combustion gas discharged from the combustion of harmful gas flowing from an external unit combustion oxidation to process the first, the combustion oxidation unit using a catalyst unit catalytic oxidation to process the second, and the source of the heat exchange unit, and the gas flowing into the heat exchange portion for recovering the waste heat of the clean gas discharged from the catalytic oxidation unit comprising a regulating unit for controlling in accordance with the temperature or flow rate.