The present disclosure relates to a display method and a display system of video streams. The display method includes: obtaining a plurality of video streams associated with a plurality of video capture devices; determining a first plurality of video streams associated with a first escalator among the plurality of video streams; determining positions of a first plurality of video capture devices associated with the first plurality of video streams among the plurality of video capture devices over the first escalator; determining a first display order of the first plurality of video streams in a first plurality of display windows based on the determined positions of the first plurality of video capture devices over the first escalator; and displaying the first plurality of video streams in the first plurality of display windows according to the first display order.

A method for controlling conveyor devices. The method includes in response to an emergency signal, controlling a conveyor device among conveyor devices associated with a location of an emergency that moves in the same direction as an escape direction to continue moving; and stopping a conveyor device among the conveyor devices associated with the location of the emergency that moves towards a floor where the emergency occurs from moving towards the floor; and in which the conveyor devices associated with the location of the emergency includes a conveyor device with either its conveying entrance or its conveying exit located on the floor where the emergency occurs.

A method for setting the state of a scenario detection module of an escalator includes: acquiring running direction information of an escalator; and according to at least the running direction information, setting the states of the scenario detection modules U.sub.1, U.sub.2, . . . , U.sub.N in a scenario detection module set U for the escalator to be activated or disabled. The computing capability required for scenario detection of the escalator can be lowered.