Particulate matter system over the ocean(i. e. marine aerosols)is very complex composition and source. Marine aerosols play a significant role in the total number of atmospheric particulate matter and they are an important part in the study of atmospheric science and global change. Compared with traditional off-line observational analysis,the online particle mass spectrometric instruments have high sensitivity,high detection efficiency, high spatial and temporal resolution so that online measurements are widely used to characterize the fine particulate matter(fine atmospheric aerosol). The study in this paper focusd on the most widely used Aerosol Mass Spectrometry(AMS)and Aerosol Time of Flight Mass Spectrometry(ATOFMS),which were used to investigate and characterize the aerosol in islands,coastal oceans,open oceans and polar regions,respectively. We suggest the integrated use of the above-mentioned two mass spectrometers to investigate marine aerosol particle size,chemical composition and mixed state to obtain scientific data during China's offshore haze monitoring network and air pollution control.