Lidar with high spatial and temporal resolution detects atmospheric parameters by receiving the echo signal signal. Because of the disturbance of strong solar background light, the signal-to-noise ratio (SNR) of lidar in the daytime is greatly restricted so that the atmospheric parameters and characteristics of the atmospheric boundary layer are hardly observed with consistent quality through day and night. The photon counting lidar prototype in Fraunhofer dark lines is devised to solve this problem. The atmospheric boundary layer of Qingdao suburb is observed using the lidar. The SNR is improved 2~3 times by operating the lidar at the wavelength of solar dark lines. The extinction coefficient obtained by inversion of the detected data illustrates the vertical structures of aerosol in the atmospheric boundary over Qingdao suburb during summer 2011.