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The hind wing of ladybug is an incredible foldable structure.Such a membranous and fragile structure can be perfectly folded underneath the forewing during the crawling or completely unfolded during the flying.The bionic engineering research has always been fascinated by the amazing folding and unfolding capability of ladybug hind wing.However the mechanical principle still remains a mystery.Measuring the morphology and spatial distribution of the flexural stiffness of the ladybug hind wing is the first step to uncover the mystery.In present paper,a simple but robust laser stripe triangulation is proposed to achieve the measurement.The wing partly transparency,small in size and highly complex corrugated,precisely measuring the details by triangulation is the most difficult parts in this work.