In order to evaluate a motor- function disorder accompanying a brain disease by a non- conventional new method, a brain function evaluation system (1) is provided with: a display device (11) for displaying an index indicated by a subject (X); an indicated position specification unit (14) for specifying an indicated position indicated by the subject (X) on the display device (11); and a deviation amount calculation unit (16) for calculating a deviation amount between the display position of the index and the position indicated by the subject (X).