Method and device for adjusting brightness of display screen and vehicle

The invention provides a method and device for adjusting the brightness of a display screen and a vehicle, and the method comprises the steps: setting the brightness value of the display screen as an initial brightness value corresponding to the environment information based on the current environment information of the vehicle; in the vehicle driving process, sight gazing information of a user is obtained, and the sight gazing information comprises a movement track between a target position and the display screen; the brightness value of the display screen is adjusted on the basis of the initial brightness value based on the motion trail and the environment information, through the method, the brightness of the display screen can be automatically reduced according to the sight gazing information of the user, the user can more concentrate on driving, and when the display screen is too dark, the brightness of the display screen can be automatically reduced. The brightness of the display screen is automatically