Ultra-large and ultra-lightweight gossamer space structure has received the widest attention due to its small packaging volume and low launching cost. Wrinkles are a common deformation status and a main failure mode of such structures. Experimental test is a main part of wrinkling analysis on gossamer space structures. The contact test can’t be used to accurately determine the wrinkling behaviors because of the characteristics of lightweight and flexibility. Non-contact photogrammetry has been successfully applied to the test of deformation of gossamer space structures[1, 2]. Pappa[3] did the test on wrinkle deformation based on the dot-projecting photogrammetry, the out-of-plane wrinkle amplitude was obtained. By now, the accurate test on the small amplitude wrinkle in small scale structures is a key problem of wrinkling experiment.