Data transmission device and method of electric energy meter on-site calibration instrument

The invention discloses a data transmission device and method for an electric energy meter on-site calibrator. The device comprises a mobile operation app and a data transmission terminal. Tthe mobile operation app is in wireless connection with the power marketing system and the data transmission terminal, and the data transmission terminal is in communication connection with the electric energy meter on-site calibration instrument; wherein the mobile job app is used for receiving an operation and maintenance work order issued by the power marketing system and sending the operation and maintenance work order to the data transmission terminal, and receiving the test data and sending the test data to the power marketing system; the data transmission terminal is used for analyzing the operation and maintenance work order, escaping and packaging the operation and maintenance work order into a protocol instruction supported by the electric energy meter on-site calibrator, and sending the protocol instruction to t