MAINTENANCE ASSISTANCE SYSTEM, NUMERICAL CONTROL DEVICE, AND METHOD FOR CONTROLLING MAINTENANCE ASSISTANCE SYSTEM

A maintenance assistance system (400), provided with a numerical control device (1) for controlling the driving of an operation mechanism of an industrial machine, and a server (200), which is an assistance device capable of communicating with the numerical control device (1). The maintenance assistance system assists the maintenance of the industrial machine. The numerical control device (1) is provided with a first information generation unit for acquiring data pertaining to the operation situation of the operation mechanism when an abnormality in the operation of the operation mechanism has been identified from among data relating to the operation state of the operation mechanism, and generating first information including the acquired data. The server (200) is provided with a second information generation unit for generating, on the basis of the content of the first information, second information to be proposed to the numerical control device (1) for maintenance. 对工业机械的维护进行辅助的维护辅助系统(400)具有数控装置(1)和服务器(200