To obtain patient information at the time of medical treatment due to an accident, a sudden illness, etc., without using a card etc., by sharing patient information data managed by medical facilitates.

A terminal device 2-1 sends out fingerprint data, read by a fingerprint reader, to a fingerprint data management device 6 to make a request to retrieve fingerprint data. The fingerprint management device 6 checks whether or not fingerprint data matching the fingerprint data sent from the terminal device 201 is stored. The fingerprint data management device 6 once retrieving the fingerprint data matching the sent finterprint data sends Information data on a connection with a patient information management device where patient information data on the patient corresponding to the fingerprint data is stored and the patient ID code back to the terminal device 2-1. The terminal device 2-1 reads patient information data on the patient out of a patient information management device 3-2 on the basis of the connection information data and patient ID code.