A screen brightness adjustment method, carried out in an electronic device, and comprising: obtaining an ambient light brightness in a first display scenario, wherein the first display scenario comprises any one of a text reading scenario, a video scenario, or a game scenario; determining a screen backlight brightness in the first display scenario based on the ambient light brightness and a first brightness adjustment rule, wherein the first brightness adjustment rule is determined based on at least two different ambient light brightnesses in the first display scenario, manually-adjusted screen brightnesses corresponding to the at least two different ambient light brightnesses, and a preset automatic brightness algorithm; and adjusting a screen brightness of the electronic device based on the screen backlight brightness in the first display scenario; if a variation of the ambient light brightness is less than or equal to a first threshold, when the first display scenario is switched to a second display scenario, determining a screen backlight brightness in the second display scenario based on the ambient light brightness and a second brightness adjustment rule, wherein the second display scenario comprises any one of a text reading scenario, a video scenario, or a game scenario, and the second display scenario is different from the first display scenario; and the second brightness adjustment rule is determined based on at least two different ambient light brightnesses in the second display scenario, manually-adjusted screen brightnesses corresponding to the at least two different ambient light brightnesses in the second display scenario, and the preset automatic brightness algorithm. obtaining an ambient light brightness in a first display scenario, wherein the first display scenario comprises any one of a text reading scenario, a video scenario, or a game scenario; determining a screen backlight brightness in the first display scenario based on the ambient light brightness and a first brightness adjustment rule, wherein the first brightness adjustment rule is determined based on at least two different ambient light brightnesses in the first display scenario, manually-adjusted screen brightnesses corresponding to the at least two different ambient light brightnesses, and a preset automatic brightness algorithm; and adjusting a screen brightness of the electronic device based on the screen backlight brightness in the first display scenario; if a variation of the ambient light brightness is less than or equal to a first threshold, when the first display scenario is switched to a second display scenario, determining a screen backlight brightness in the second display scenario based on the ambient light brightness and a second brightness adjustment rule, wherein the second display scenario comprises any one of a text reading scenario, a video scenario, or a game scenario, and the second display scenario is different from the first display scenario; and the second brightness adjustment rule is determined based on at least two different ambient light brightnesses in the second display scenario, manually-adjusted screen brightnesses corresponding to the at least two different ambient light brightnesses in the second display scenario, and the preset automatic brightness algorithm.