To allow a care worker to obtain information that is necessary for visit nursing from the house of a person who needs nursing and to provide related information to the person who needs nursing, to allow the person who needs nursing to take medical advice from a doctor at home and to further keep the security of information about the person who needs nursing.

Access to a data base 101 of a main device A is made from the house of a person who needs nursing through a CATV line D by using a portable terminal device and necessary information is downloaded to the portable terminal device and is offered to the person who needs nursing. The condition of the person who needs nursing is transmitted to the device A from a video processing terminal B through the line D on which even video data can be transmitted at a sufficient speed and the person receives medical advice from a doctor. Further, erroneous writing and leakage are prevented because the ID of a care worker is read by an ID identifying part 110 and a deciding part 111 decides the propriety of accessing requested information at the time of accessing the database 101.