The properties of aerosol include physical, chemical and optical characteristics. Whiles the determinant of optical parameters is the prerequisite for accurate estimation to the radiation forcing. A method for determining aerosol extinction with look-up table is presented combined with radiative transfer model. Also the effects of single scatter albedo rate, asymmetry parameter and ground albedo rate on the simulation of O4 air mass factor are studied. Using O4 air mass factor based on multi-axis differental optical absorption spectroscopy (MAX-DOAS) measurement at different elevation angles, simulated O4 air mass factor and the factor got through the radiative transfer model are compared. The aerosol optical density, boundary height and extinction coeffcient are retrieved after the process of minimization and linearly interpolation. Creating a look-up table, the aerosol extinction is determined at Shanghai Baoshan monitoring site using MAX-DOAS. Compared with lidar, it shows a reasonable agreement. It′s turned out that the look-up table can be used to detect the properties of aerosol.