Hinge and hinge monitoring method

Provided is a hinge that can prevent a defect, a failure, or the like with greater certainty, and enables inspection and repair work to be efficiently carried out. A hinge comprises a first wing member that is connected to a first connection object and a second wing member that is connected to a second connection object. The hinge rotatably connects the second connection object to the first connection object. The hinge comprises a sensor that detects a change inside the hinge or in a prescribed external environment change in the external environment detected by the sensor to the outside via a sensor that detects a prescribed component constituting an odor, a gas sensor that detects a prescribed gas, a dust sensor that detects the amount of dust, and a illumination sensor that detects brightness.