A management system for a working device, comprising: a wireless tag attachable to the working device, having a storage part to store identifying information of the working device; a communicating part to transmit at least the identifying information; a code providing part providing the identifying information with use of a graphic; a mobile terminal having: a reading part configured to read the graphic of the code providing part; a registration part configured to decode, into the identifying information, the graphic read by the reading part; and a displaying part configured to display the decoded identifying information; the management system characterized in that: the wireless tag includes a housing, wherein the code providing part is sheet-like and attached to the housing which stores the communication part and the storage part, the identifying information stored in the storage part is the same as the identifying information provided by the code providing part, and the mobile part has a first inputting part to which first information relating to the working device can be inputted, wherein the registration part is configured to relate the identifying information displayed on the displaying part to the first information inputted to the first inputting part, and is configured to register the identifying information and the first information. a wireless tag attachable to the working device, having a storage part to store identifying information of the working device; a communicating part to transmit at least the identifying information; a code providing part providing the identifying information with use of a graphic; a mobile terminal having: a reading part configured to read the graphic of the code providing part; a registration part configured to decode, into the identifying information, the graphic read by the reading part; and a displaying part configured to display the decoded identifying information; a reading part configured to read the graphic of the code providing part; a registration part configured to decode, into the identifying information, the graphic read by the reading part; and a displaying part configured to display the decoded identifying information; the management system characterized in that: the wireless tag includes a housing, wherein the code providing part is sheet-like and attached to the housing which stores the communication part and the storage part, the identifying information stored in the storage part is the same as the identifying information provided by the code providing part, and the mobile part has a first inputting part to which first information relating to the working device can be inputted, wherein the registration part is configured to relate the identifying information displayed on the displaying part to the first information inputted to the first inputting part, and is configured to register the identifying information and the first information. the wireless tag includes a housing, wherein the code providing part is sheet-like and attached to the housing which stores the communication part and the storage part, the identifying information stored in the storage part is the same as the identifying information provided by the code providing part, and the mobile part has a first inputting part to which first information relating to the working device can be inputted, wherein the registration part is configured to relate the identifying information displayed on the displaying part to the first information inputted to the first inputting part, and is configured to register the identifying information and the first information.