Abstract: Disclosed is a method for testing a visual function (visual acuity and color function) using a display device; and, more particularly, a method for improving accuracy of the visual function testing and reducing human resources in testing the visual function of an examinee. The present invention improves subjective errors caused by the subjective visual function testing and may be easily used in a visual function testing requiring an objective and exact testing results in such as military affairs, vocational aptitude test, driving license, insurance against loss, observation of an ophthalmic ailment. Further, automatic testing method of the present invention is widely used in hospitals, opticians, schools, companies, public health centers, other organization and households where it is difficult to take professional advice with a low cost.