In this study, we created a DBD plasma device and a MnO₂ catalyst mesh filter for evaluating ozone reduction of devices via the catalyst method. The DBD plasma device was manufactured by applying MnO₂ paste to soda lime glass via the screen-printing method. The MnO₂ catalyst mesh filter was manufactured by mixing MnO₂ powder with binder with a 10% difference in concentration from 10% to 50% and then applying it using the dip-coating method. Finally, we sintered a MnO₂ catalyst mesh filter in an electric furnace. We evaluated the characteristics of ozone generation according to the MnO₂ gas flow of DBD plasma devices, the opening ratio, and ozone reduction performance of the MnO₂ catalyst filters. Ozone reduction performance was approximately 20.4% at MnO₂10 wt%, 37.8% at MnO₂ 30 wt% and 50% at MnO₂ 50 wt%.