Abstract: Ordered mesoporous CuO was prepared by a nitrate combustion method with mesoporous silica KIT-6 as template, and characterized by X-ray diffractometer, transmission electron microscope, and specific surface area and porosity analyzer. The results show that the prepared mesoporous CuO had a highly ordered mesoporous structure and a nanosized crystal structure with bi-modal pore size distribution centered at 3.7 nm and 10 nm. With the sintering temperature increasing from 300℃ to 700℃, the mesoporous structure of mesoporous CuO contracted, the grain size increased, and the specific surface area decreased. The mesoporous CuO had the stable electrochemistry performance and small molecular gas adsorption performance, which had a discharge capacity over 600 mAh·g^-1 after 50 cycles of charge-discharge at current density of 100 mA·g^-1, and adsorption capacities of 1.2, 0.75 mmol·g^-1 for NO and CO, respectively.