1. A method, comprising: acquiring, by use of a servomechanism of terminal equipment configured in a cinema auditorium, screen brightness and brightness of a side screen material surface illuminated by projection ambient brightness in the cinema auditorium; comparing the acquired screen brightness to the brightness of the side screen material surface to determine if projection of a film has started; activating, after it is determined that the projection of the film has started, an acquisition and recognition device of the terminal equipment to acquire an auditorium infrared picture during projection; recognizing, by the acquisition and recognition device, human bodies in the acquired auditorium infrared picture during projection to count the number of persons in the cinema auditorium; and uploading, by a communications device of the terminal equipment, the counted number of persons to a monitoring platform.