Damper and damper monitoring method

A damper is provided which can more reliably prevent malfunction and breakdown and which enables efficiently performing repair and inspection operations. The damper, provided with a casing linked to afirst object and a rotating part linked to a second object rotatably attached to the first object, damps rotation in either the direction closing or the direction opening the second object, and is provided with a sensor which detects prescribed change in the external environment in the damper or around the damper, and a control unit which externally communicates, over a communication network, information relating to the change in the external environment detected by the sensor, wherein the sensor is configured from at least one of: a rotation speed sensor, a vibration sensor, a load sensor, an angle sensor, a temperature sensor, an air pressure sensor, an odor sensor, a gas sensor, a dust sensor, and an illuminance sensor. 本申请提供一种能够更可靠地防患不良状况、故障等于未然并且能高效地进行修理检验作业的阻尼器。阻尼器具备：壳体，连结于第一对象物；以及旋转部，连结于可旋转地装配于第一对象物的第二对象物，