The invention provides a management system, an electronic instrument and a management method, which can manage objects used in the electronic instruments without arranging a memory storage. The management system includes an electronic instrument and a management server. The electronic instrument is configured to acquire identification information from the managed article used by the electronic instrument with the identification information being read-only information, and to transmit information including the identification information to the management server. The management server is configured to reference registered database, in which information corresponding to the identification information of a plurality of managed articles is registered in advance, using the identification information transmitted from the electronic instrument to record at least a portion of the information transmitted from the electronic instrument in the identification information database.