Based on the principle of conoscopic holography, a high-precision non-contact measure system is designed for the measurement of typical industrial parts. Using this system, height information of coin surface is acquired. After recording of the conoscopic holograms of the coin, the interference fringes are processed by centerline refinement, through which we can calculate the variation in the fringe width, and thus obtain the height information of the coin surface. The results show that when the focal distance of objective is 50 mm the accurate measurement range of the system is 5 mm, with a maximum error of 0.28%, verifying the feasibility and accuracy of the conoscopic holographic measure system.