Abstract: This paper presented the fog-haze measurements by Raman-Rayleigh-Mie lidar in north suburb of Nanjing, the measurement results were analyzed and compared with the weather forecast. Continuous measurements were carried out on 2/12/2009, it was clear day from 01:00 to 08:00 in the morning, and foghaze was measured from 10:00 in the morning to 19:00 in the evening. The fog-haze measurement results coincided with the weather forecast on that day. The fog-haze lidar measurement results on 2/12/2009 were analyzed and compared with the boundary aerosol measurement results on 10/01/2011, the differential characters of range-corrected-signals between fog-haze and boundary aerosol were discussed. It is shown that fog-haze usually occurs at about 300m height with a depth of 700m and boundary aerosol usually occurs at about 1000m height with a depth of 1300m in Nanjing.