In order to establish an information service system that addresses the needs of patients with dementia and their families, we conducted an interview survey of 7 patients with dementia and 35 family carers. Verbatim transcripts of interview contents were subjected to theme analysis. The following six topics were extracted: “onset of symptoms,” “changes in cognitive function-memory, time, space, and language,” “feelings when diagnosed (the early-onset dementia patient),” “feelings when diagnosed (the family providing care),” “going to the hospital,” and “disclosing that the patient has an illness.” The website was constructed based on these findings.