Parking lot fee evasion prevention method and system and storage medium

The invention relates to a parking lot fee evasion prevention method and system and a storage medium, and relates to the field of parking lot management technology, and the method comprises the steps: obtaining the railing use state of a first railing; when the handrail using state is consistent with the handrail lifting state, timing is conducted to obtain the overall handrail lifting duration; when the overall rod lifting duration is longer than the normal use duration, the projection equipment is controlled to work, a stop area is defined, and an indication mark is generated; acquiring a light receiving state of each receiving point in the stay area, and defining a coverage point according to the light receiving state; counting according to the coverage points to determine a coverage number, and determining a coverage ratio according to the coverage number and the total receiving amount; when the coverage ratio is greater than the reference ratio, delimiting an interval boundary according to the coverage p