A method and a device for remote monitoring supervisory information about maintenance of a hinge are provided that are capable of improving efficiency of periodical inspection and maintenance of a hinge and capable of preventing inconvenience and a trouble of the hinge in advance. A hinge 3 rotatably supports an opening and closing member 2 with a fixed member 1 of an instrument or the like. Supervisory information about maintenance of the hinge 3 is detected. The detected supervisory information is transmitted to a maintenance management server 7 via a communication network like the Internet 6. The maintenance management server 7 manages the maintenance of the hinge based on the supervisory information.