As a clinical instrument, CyberPen is optimized and commercialized to capture 3D model of human spine and pathological analyze the spine posture in comparison with right anatomy. The AI based accurate analysis on the 3D data of spine status is presented by the system to assist orthopedic physician in diagnosis. The corresponding application software shows 3D model and key points of analyzed data relating to the spine posture. Medical application of CyberPen for modelling human spine can improve the posture status of standing, sitting and using smart phone, tablet or PC and recover the wrong habits.