The study will investigate the feasibility of manufacturing the catalytic activated carbons from agricultural wastes. The use of carbon will be economical, since rice hull, sugarcane bagasses, coconut bagasses are waste products in large quantities, especially in Taiwan. In this year, the objective of this study was to prepare the catalytic activated carbons from agricultural wastes with high carbon content from chemical activation method and was employed for pesticides treatment. The comparison between traditional chemical activated method and new developing immersion method will be made. Utilizing various preparing conditions, such as carbonization temperature, final activation temperature and immersed solution, the physical and chemical characteristics, the efficiencies of adsorption and oxidation for scrubbing wastewater by catalytic activated carbons/H<sub>2</sub>O<sub>2</sub> will be investigated. The adsorptiive and oxidatiive capacities of catalytic activated carbons for wastewater treatment will be discussed. The effects of various preparing conditions on physical properties (hardness and bulk density), chemical properties (chemical constituents, ash content, conductivity, surface pH value, oxgenized functional groups), morphology (roughness, porosity, pore size, and pore fraction), adsorption properties and oxidation properties (TOC removal efficiency of pesticides treatment) of catalytic activated carbons will be measured by means of the methods reported in the literatures. The best preparing conditions will be determined by the high COD removal efficiency of pesticides. Moreover, the results will provide another treatment of large supply of agricultural waste. The agricultural wastes will be high microporous structure, high surface area, and high oxidative efficiency for organic pollutants by the treatment of pyrolysis. The catalytic activated carbon that is a stable, versatile adsorbent and effective oxidative catalyst due to its good adsorption and oxidation properties.