Due to the population growth and the increased demand of fossil fuels, mankind has faced energy and environ-mental pollution problems. Therefore, it is required to develop carbon dioxide to a usable energy source by con-version of atmospheric carbon dioxide. As a solution to these energy / environmental problems, researches on the conversion of carbon dioxide into photocatalyst using sunlight, which is a sustainable energy source, are attracting attention. Carbon dioxide can be changed in various products depending on the electron transfer and adsorption of the intermediate states such as carbon monoxide, formic acid, and methane. It is essential to regulate the adsorption energy of the intermediate product, CO, and to understand the reaction mechanism for the selective conversion of the desired product. From this point of view, the reaction surface of the catalyst must be studied. This thesis focuses on catalyst surface control for carbon dioxide conversion and its mechanism analysis.