Aerospace products have high-precision measurement requirements for attitude parameters, and cubic mirror-theodolite alignment measurement method is widely used.Based on the principle of theodolite auto collimation research, product attitude adjustment measurement proposed by real-time measurement, principle of the method, the scope and application experience have been introduced.This method can achieve real-time measurement of the product, adjustment of the operation is accuracy and immediate intervention, reduce the number of instrument station calibration and product attitude measurement frequency, improve measurement efficiency, and reduce operating strength.