There is a demand to learn about optical illusion because the image contents involves an illusionary phenomenon. Conventional optical illusion learning is consisted of only simulation and questions about optical illusion, and it was difficult to learn to use optical illusion in image contents. In this system, knowledge of optical illusion can be applied to image contents by answering questions about optical illusion in image contents. By recording and analyzing answers and illusion amount, it is possible to use countermeasures against occurrence and alleviation of optical illusions in image contents. Based on the result of the evaluation questionnaire, this system was verified as effective for learning to use optical illusion in image content creation.