In the dementia determination system (100), the button of the operating device (140) is pressed longer than the reference time with respect to the number of times the button of the operating device (140) used by the user to operate the electric device (130) is pressed. The acquisition unit (111) that acquires the long press ratio, which is the ratio of the number of long presses, and the determination unit (112) that determines the dementia level of the user based on the long press ratio acquired by the acquisition unit (111). And an output unit (113) that outputs dementia information indicating the dementia level determined by the determination unit (112), and the determination unit (112) increases the dementia level as the long press ratio is lower. Determined to be severe.認知症判定システム(100)は、電気機器(130)に対する操作にユーザが用いる操作装置(140)のボタンが押された押下回数に対する、操作装置(140)のボタンが基準時間よりも長く押された長押し回数の割合である長押し割合を取得する取得部(111)と、取得部(111)で取得された長押し割合に基づいて、ユーザの認知症レベルを判定する判定部(112)と、判定部(112)で判定された認知症レベルを示す認知症情報を出力する出力部(113)とを備え、判定部(112)は、長押し割合が低いほど、認知症レベルをより重度と判定する。