The invention discloses a method and system for remotely calibrating the message dispersion of an electronic transformer, and belongs to the technical field of electronic transformer detection and calibration. The method comprises the following steps: preliminarily screening data messages according to calibration parameters and synchronous pulse signals to obtain electronic transformer messages, and storing the electronic transformer messages; carrying out link encryption on the preliminarily screened electronic transformer message to generate an encrypted data message, and storing the encrypted data message in a cloud server; acquiring the encrypted data message stored in the cloud server, and decrypting the encrypted data message according to a preset format to acquire an electronic transformer message; and reading the electronic transformer message, detecting the dispersion of the electronic transformer message according to a standard pulse per second signal, obtaining a calibrationparameter, and calibrating the electronic transformer message. According to the invention, the detection and calibration method of an electronic transformer calibrator is improved, the detection andcalibration process is optimized, the detection period is shortened, and human resources are saved.