A parts-management system includes a terminal apparatus and a management apparatus for communicating with the terminal apparatus. The terminal apparatus includes a first memory which stores identification information of each part used in the terminal apparatus and an operation value corresponding to an operation of each part in a mutually related manner, a controller which performs a predetermined operation processing corresponding to an operation of each part and updates the operation value stored in the memory when the part operates, a first transmitter which transmits the identification information of each part and an operation value corresponding to the identification information to the management apparatus, and a second transmitter which transmits a request signal for requesting a transmission of an operation value for at least one part. The management apparatus includes a second memory which stores the identification information of each part and the operation value each sent by the first transmitter in a mutually related manner, and a third transmitter which transmits the identification information and the operation value each stored in the second memory to the terminal apparatus in response to the request signal.