Rotation accuracy measuring method and measuring apparatus

The invention provides a rotation accuracy measuring method and measuring apparatus. The method comprises: a coordinate (x11, y11) of a first feature point in a first image and a coordinate (x12, y12)of the first feature point in a second image as well as a coordinate (x21, y21) of a second feature point in the first image and a coordinate (x22, y22) of the second feature point in the second image are extracted; according to the coordinates (x11, y11) and (x21, y21), a first azimuth angle theta 1 is determined; according to the coordinates (x12, y12) and (x22, y22), a second azimuth angle theta 2 is determined, wherein an included angle theta between the first azimuth angle theta 1 and the second azimuth angle theta 2 is obtained based on a formula: theta=theta2-theta1; and the included angle theta is compared with a driving angle in a driving instruction and a rotation precision value of a to-be-tested rotation platform is determined based on the comparison result. According to the method provided by the inv