Dong Fang Hong No.2, a scientific survey ship belonging to Ocean University of China, has a voyage on the north Yellow Sea of China during the period from 14 th to 25 th in October of 2007 . The aim for this sailing is to attain aerosol optical properties data in that sea area. During the voyage, POM01-MKII, a seven bands auto sky radiometer made in Japan, was used in order to measure the precise aerosol optical data and it got lots of true measurement data. After dealing with the data, aerosol optical thickness(AOT), single scattering albedo(SSA), and columnar volume spectrum were obtained. The results showed that the value of AOT at 500 nm is less than 0.36 and the value at 870 nm is less than 0.15 when it has no cloud. Under the situation of fog or haze, the value of AOT is approximate 5 times bigger than that of without cloud; seeing from SSA, aerosol lies in absorption over the North Yellow Sea and the rule is that the nearer the distance to the bank is, the stronger the absorption is; the further the distance to the bank is, the weaker the absorption is; seeing from columnar volume spectrum, accumulation particle content from land has a largely relation with the absorption of aerosol.