The differential absorption lidar is an advanced instrument for monitoring atmospheric ozone concentration profile. A new vehicle differential absorption lidar is developed. The lidar system emits four wavelengths ultraviolet laser based on a frequency quadrupled NdYAG laser and Raman shifting technique. A Cassegrain telescope is used and the grating spectrometer is used to separate the backscatter signals of the four emited wavelengths. The data is collected by photon counting and analog acquisition integration mode. The accuracy of measurement system is discussed and analyzed. The lidar system and ozonesonde under took experiments at the same time. Experimental results show that tropospheric ozone profiles derived from lidar and ozonesonde are in good agreement, suggesting that the vehicle differential absorption lidar system and ozone concentration analysis software are reliable.