<;P>;PROBLEM TO BE SOLVED: To provide a system for viewing his or her intention and attention of an user and supporting the activity of the user more suitably. <;P>;SOLUTION: This invention of an activity supporting system 10 measures the distribution and sight line at the head site of &alpha;-wave intensity (brain activity fluctuating amount) of the user, and measures the attention area in the eyesight of the user based on the &alpha;-wave intensity distribution and sight line. The changing pattern of &alpha;-wave intensity of the user is measured, and the attention degree of the user is measured based on the changing pattern of the &alpha;-wave intensity. The movement of an electric wheelchair 20 is controlled according to the attention area and the attention degree in the eyesight of the measured user. <;P>;COPYRIGHT: (C)2007,JPO&INPIT