Electromagnetic stirring control method and system

The invention discloses an electromagnetic stirring control method and system.The method comprises the steps that after continuous casting starts, continuous casting production information is read, modeling is conducted on the continuous casting production information, and forecast data under corresponding steel grades and working conditions are solved; starting an ultrasonic detection device when the continuous casting billet is produced to a specified position, exciting and receiving electromagnetic ultrasonic transverse waves on the upper surface of the continuous casting billet, inputting the thickness of a solidified billet shell into an industrial personal computer, and comparing the thickness with the forecast data; a target database is established, and the position of an electromagnetic stirrer is changed through a PLC according to the liquid core solidification rates corresponding to different steel types and working conditions, so that the electromagnetic stirrer is arranged at the electromagnetic s