Abstract: The imported mechanical rotating wind measurement device was adopted originally in a wind farm of Inner Mongolia.The shortage of the device existed, such as the easily damaged bearing, the short service life, the high maintenance cost, and the lower precision.Thus make reconstruction of the original mechanical measuring device with a homemade ultrasonic measuring device.The results showed that the domestic ultrasonic measuring device operated steadily and reliably, with high measuring precision, wide range, strong adaptability, long service life, and maintenance free, and it could well replace the mechanical wind equipment.