The dual-axis galvanometer system isone of the key parts of the scanning laser Doppler vibrometer. According to the spatial position relation of the XY mirrors and the principle of optical reflection in the dual-axis galvanometer system, a mathematical model isestablished. Further, the coordinate transformation of the laser points’coordinate system from the galvanometer system to the actual structural coordinate system is carried out based on polynomial fitting algorithm. So the pose of laser can be controlled precisely. Meantime, to improve the practical operation, a high-definition camera is applied to transform the actual structural coordinate system to the screen coordinate system. Finally, the validation of the proposed algorithm is performed with a compressor blade. It demonstrated the ability and reliability of the proposed method and taken a guiding function for the precise position control of laser on arbitrary measuring points.