This paper deals mainly the use of high speed photography technique, aided with identification, on the field of mechanism design. As an example, an experimental combined with mechanism synthsis has been taken on model JGN 202 wool loom for analysing the real movements of this mechanism. The lobby mechanism is of complicate cams and multi-linkages. Based on theoretical analysis and calculation, the displacement, velocity and acceleration curves were obtained for this mechanism by using of high speed photography technique. In comparison of the experimental results with the theoretical calculated curves, they appeared so closely. Not only the reliability of theoretical analysis can be checked properly, but also by the valuable data of errors presented between two sets of curves, experimental and theoretical respectively, further studying can be carried out about the affection of elastic deformation and clearence of this mechanism. Furthermore, the obtained data are reliable and accurate as the measurements were taken in non-contact condition, so it is an effective way to use this method for design and research of mechanisms evidently. Therefore, the introduce of high speed photography technique is of general significance in the area of researching work on mechanisms, and looking forward further progress appear far and wide.