By analysis of the component and structure of real high olefinic FCC naphtha, a technology of deep desulfurization and olefin saturation with minimal octane loss is developed, which is named RIDOS. The multifunctions of RIDOS technology are achieved by using a series of new catalysts, which show the good feed adaptability and operation flexibility. The results of the first commercial RIDOS unit show that an ultra-low sulfur (w(S)＜ 10 /μg/g), low olefins gasoline (φo＜20%) is produced, while the road octane number loses only 1.3 unit. RIDOS technology provides the possibility for producing the clean fuels meeting most strict specifications.