In the wind tunnel experiments, there are some unfavorable factors when acquire oil film evolution image on surface of the wing to be measured. These unfavorable factors include surface curvature of the wing、surface vibration、the relative position of imaging equipment、changes in the refractive index of light and so on. In order to overcome these unfavorable factors, projection measurement technique for curved surfaces is introduced. According to the imaging principle of pinhole camera model, we establish the mapping model of the pixels in the imaging plane and its corresponding spatial position in this paper because of filming figure brightness is not high, marked points is not easy to extract. Redundancy information fusion methods are used to reduce the mark point extraction error. In the experiment of measuring the wing surface friction using fluorescent oil film method in wind tunnel, surface projection measurement technique has been verified，and the 2D oil film evolution image is projected into the corresponding threedimensional space.