Elevator on-demand maintenance method and system based on Bayesian and risk sequence number

The invention relates to the technical field of elevator maintenance, and particularly discloses an elevator on-demand maintenance method and system based on Bayesian and risk sequence numbers, and the method comprises the steps: determining a potential failure mode of a function through the function of an elevator needing to be maintained; based on the potential failure mode of the function and the dynamic data of the elevator needing to be maintained, the safety risk severity score, the safety risk occurrence degree score and the safety risk difficulty degree score of the elevator needing to be maintained are determined; the elevator risk priority number is determined according to the safety risk severity score, the safety risk occurrence degree score and the safety risk difficulty degree score; when the elevator risk priority number is larger than the threshold value of the elevator risk priority number, maintenance measures are taken; otherwise, the maintenance measures are not taken. According to the ele