The biological information measurement system of the present invention includes a test subject-side device 6 provided in a toilet installation room, and a server 12 communicable with the test subject-side device 6, the test subject-side device 6 includes a sulfur-containing gas sensor 26 sensitive to sulfur-containing gas and outputting detection data, a transmitter-receiver 56 transmitting measurement data including detection data of the sulfur-containing gas detected by the sulfur-containing gas sensor 26 to the server 12, and the server 12 includes a database in which measurement data including detection data of sulfur-containing gas detected by the sulfur-containing gas sensor 26 is accumulated and recorded with dates and times of defecation acts by being associated with test subject identification information, and server-side data analyzer that analyzes physical condition of a test subject on the basis of a time-dependent variation tendency of the measurement data accumulated and recorded in the database.
