Objective : We try to show the necessity of crafts and arts comparing visual perception of autism with that of mental retardation using craft programmes. Methods : We applied a visual perception programme after sorting 10 autism and 10 mental retardation according to criteria. A used craft programmes are consulted and produced by specialist who are applying crafts as treatment or have experienced applying crafts. The items included potter, mobile art, wheat flour kneading, clay, corrugated cardboard work and color mix work. We applied the programmes twice a week during 4 weeks and used motor-free visual perception test-third edition(MVPT-3) to investigate the effect before and after treatments. Results : First, craft programmes had effect on both autism and mental retardation. Second, craft programmes had more effect on mental retardation. Conclusion : We could know that craft programmes influenced on visual perceptional development of autism and mental retardation.