Maintenance support system, maintenance support method, and maintenance support program

This equipment element maintenance support method comprises: a monitoring step (ST2) for monitoring the state of an equipment element; a maintenance period determination step (ST3) for determining the maintenance period of the device element on the basis of the monitoring result; and a production-change adjustment plan creation step (ST8) for creating a production-change adjustment plan for changing the equipment element attached to the production equipment on the basis of the current configuration information of the equipment element and the configuration information for producing the new product. In a production change adjustment plan creation step (ST8), although equipment elements attached to production equipment can also be used for production of a new product, a production change adjustment plan for replacing the equipment elements with other equipment elements is created when the production of the new product becomes a maintenance period. 本公开的设备要素的维护支援方法包含：监视设备要素的状态的监视工序(ST2)；基于监视结果，决定设备要素的维护时期的维护时期决定工