The invention discloses a method and system for controlling the closing of lamps. The method comprises the following steps: judging whether a person is in a sleep state through human body biological characteristics in response to manual trigger, and closing the corresponding controlled lamps. By implementation of the road indicating system and the road indicating method provided by the invention, when a vehicle is travelling on a one-way street on which orthophoria cannot be realized, the vehicle can pass the one-way street without meeting other vehicles. By implementation of the method and system for controlling the closing of lamps, after people corresponding to the lamp sleep, the lamps are automatically closed to save energy and improve the sleep quality.