A lidar system that combines backscattering, side-scattering, and Raman-scattering lidars has two obvious advantages in detecting the extinction coefficients of tropospheric aerosols: 1) the lidar ratio (LR) does not need to be assumed in the retrieval of aerosol extinction coefficients; 2) there are no near-ground transition and blind areas. Herein, we obtain the 146-day data by using an integrated lidar system in Hefei city from January 2017 to December 2018. We retrieve and statistically analyze the extinction coefficients of aerosols to get the average LR of aerosols of 68.4 sr, the monthly distribution of average LR , and the monthly, seasonal, and annual average profiles of aerosol extinction coefficients. Some cases show that the aerosol extinction coefficient versus height and time is very complicated under 0.6 km altitude, which cannot be detected by the traditional backscattering lidar. Moreover, the errors in the aerosol extinction coefficient retrieved from the empirical LR are analyzed by comparison. The obtained results provide a scientific basis for studying air pollution transmission and control.