This paper presents the aerosol measurements in north suburb area of Nanjing and the analysis results. The aerosol in north suburb area of Nanjing is measured regularly by Raman-Rayleigh-Mie lidar system, and the results are analyzed. Variation of calculation result of aerosol extinction coefficient with boundary value is discussed in detail. The method for selecting more accuracy boundary value is suggested, and based on which, more accurate aerosol extinction coefficient is obtained. By comparing with other ground-based measurement results, it is indicated that aerosol Raman-Rayleigh-Mie lidar measurement results are comparable, and the method for boundary-value selection and aerosol extinction coefficient calculation is reliable.