Abstract: The performances of 3D Laser Doppler Velocimetry(LDV) and Adaptive Phase Doppler(Velocimetry)(APV) were introduced, and the structure and work principle of air-water humidifying nozzle were analyzed.The atomizing characteristic of the nozzle was experimented with 3D LDV/APV system, the results indicated that the nozzle could be applied to various functional storage rooms and manufacturing department in cigarette production, and offered good humidity control.