Three-in-one electricity meter automatic calibrating system and method for achieving automatic calibration through same

The invention relates to the field of instrument calibration, particularly to a three-in-one electricity meter automatic calibrating system and method. The system comprises a control and management system, a measurement system and an automatic image collecting system, wherein the measurement system and the automatic image collecting system are communicated with the control and management system; the control and management system comprises a master control computer; the measurement system comprises a signal source electrically connected with a meter to be calibrated, and a standard meter connected with the signal source; the automatic image collecting system comprises a camera; the signal source, the standard meter and the camera are respectively provided with a communication interface and communicated with the master control computer through the communication interfaces. The three-in-one electricity meter automatic calibrating system can achieve fully-automatic calibration of a three-in-one electricity meter and greatly improve the calibrating efficiency and reliability.