Provided is a dementia risk presentation system (10) for presenting the risk of dementia in a user. This presentation system comprises: a first database (17) wherein sample brain health data (17a) including at least any among sample brain state data (17d), which are data pertaining to the brain states of sample subjects, and sample cognitive data (17e), which are data pertaining to the brain function of cognition, are associated with individual characteristics (17b) including at least one among age, gender, and body information of each of the sample subjects； a first recognition unit (11) recognizing user brain health data (18a) including at least any among user brain state data (41) and user cognitive data (61)； a second recognition unit (12) recognizing user individual characteristics (43)； and a risk presentation unit (30) presenting a dementia-related risk line (54) and a chronological transition line (52) indicating the transition of the user brain health data from the past to the present of the user.
