Gyro’s three key parameters, output noise, resolution and phase response are calibrated in an aerial camera by using two types of devices which are commonly used in engineering. First, according to datasheet, two gyros’ noise power ratio is 784:1. By adopting a new scheme suiting for practical application, calibrated noise power ratio is 74:1 owing to system noise. Second, relationship between gyro’s resolution and analog-to-digital converter is presented. Thirdly, since there is seldom discussion about phase response in gyro datasheet, a flexible and novel experiment platform is designed, and then phases response in 0~16Hz is calibrated with error less than 5%. Finally, effects of gyro parameters on servo control system are thoroughly analyzed based on above results. Experiments indicate that the gyro parameters calibrated precisely in actual equipment improves system performance and stabilization greatly.