This dementia determination system (100) is provided with: an acquisition unit (111) for acquiring a long-press ratio which is the ratio of the number of long presses in which a button of an operation device (140) is pressed for a longer time than a reference time to the number of presses of the button of the operation device (140) used by a user to operate an electric apparatus (130)； a determination unit (112) which determines the dementia level of the user on the basis of the long-press ratio acquired by the acquisition unit (111)； and an output unit (113) which outputs dementia information indicating the dementia level determined by the determination unit (112), wherein the determination unit (112) determines the dementia level as being more severe when the long-press ratio is lower.一種失智症判定系統100，具備：取得部111，取得「為了操作電氣設備130操作者所採用之操作裝置140的按鈕被按壓了比基準時間更長時間之長按次數」相對於「該操作裝置140的按鈕被按壓的次數」之比率也就是長按比率；判定部112，根據由取得部111所取得之長按比率，判定操作者的失智症等級；及輸出部113，輸出表示判定部112所判定的失智症等級之失智症資訊；長按比率越低則判定部112判定為失智症等級越嚴重。
