In order to realize the high precision and high stability measurement of wind speed and direction in complex environment, the closed-loop control scanning technology is adopted on the basis of the wind sensor system based on the acoustic resonance principle, and the performance index of the system is greatly improved. The linear scanning of ultrasonic transducer is realized by means of acoustic resonance, and frequency modulation and intensity modulation of the signal generated by the transducer. Frequency modulation solves the problem of resonance frequency shift caused by different environmental factors such as pressure and temperature, intensity modulation solves the problem of the performance of the transducer attenuation over time, and greatly improves the signal-to-noise ratio. The experimental results show that the wind speed and direction can be measured accurately by using the closed-loop control method. Wind speed measurement range 0-50 m/s, wind speed measurement accuracy ±0.5m/s (≤15 m/s) /±5% (> 15 m/s and < 35 m/s) /±9% (> 35 m/s). The improved system is less affected by environmental changes in complex environment, has high accuracy, good stability and strong anti-interference ability.