Terminal and method for checking calibration history of scale and system for managing calibration history of scale

A system for managing a calibration history of a scale, the system comprising:

• a scale including a weight measuring unit for measuring and calculating a load weight, a memory storing reference data and identification information of the scale, the reference data being a standard when calculating a weight, and a communication unit for transmitting and receiving data to/from an external device;
• a management server including a storage storing the identification information of the scale and the most recently calibrated reference data of the scale, and a transceiver capable of transmitting and receiving data to/from the external device;
• and
• a mobile terminal including a communication module for communicating with the scale and the management server, and a history checking unit for checking whether an unauthorized manipulation of the reference data has occurred,
• wherein the history checking unit receives the identification information and the reference data from the scale through the communication module, requests the most recently calibrated reference data of the scale to the management server based on the identification information, receives the most recently calibrated reference data from the management server, and determines whether the reference data received from the scale has been manipulated without authorization according to the consistency of the reference data received from the scale and the most recently calibrated reference data received from the management server.