This experiment is composed of three parts: Gas sampling and analysis by Regenerative Thermal Oxidizer in the factory ¡Afabrication and screening of catalyst, and a discussion about efficiency of Catalytic Oxidation toluene by varied factors. Regarding gas sampling in the factory, we found that the transformation rate of VOCs by Regenerative Thermal Oxidizer(RTO) at operation temperature 982¢J into tolueneis 94.7%, into 2-butanone is 96.5%, into isopropyl alcohol is 95%. Among the three, toluene showed the lowest transformation rate. Regarding catalyst sampling and research, we found that metal catalyst by immersion method(immersion method) ( weight ratio of Cu:Co¡BCu¡GMn and Mn¡GCo is 1¡G1¡BPure Cu¡BPure Co and Pure Mn)and metal load(metal /molecular sieve) is 5%¡B10%. Among the twelve metal catalysts, we figured out 10% metal C-Co(1:1) is the best catalyst concerning transformation rate. Regarding the operation factors, the experiment showed¡G(1)the more the concentration of toluene¡Athe more the temporary inhibition¡Aand therefore, the transformation rate went down¡A(2)The more the speed of inhalation¡Athe time the air stayed still decreased, and a obvious decrease of transformation rate can be seen(3)the increase of oxygen concentration showed a positive effect toward transformation rate.(4)When at a higher reaction temperature, for the above mentioned three factors, the influence upon transformation rate became less. In addition, for the cost evaluation, the 10% metal Cu-Co(weight rate 1:1) catalyst we chose in our experiment is 92.79 Taiwanese Dollars for one batch of 120g and the catalyst per gram is 0.77 Taiwanese Dollars.