A method for displaying an electromyography signal by an electronic device comprises: determining comparative levels corresponding to six grades of an Oxford grading ruler, comparing a measured electromyography signal voltage U with a comparative level A, and when U=A, a CPU of the electronic device outputting grade information corresponding to an Oxford grading ruler corresponding to the comparative level to a display screen when U>A, comparing the electromyography signal voltage with a larger comparative level adjacent to the comparative level, and when U A, la comparaison de la tension de signal délectromyographie à un niveau comparatif supérieur ad
