The invention discloses a screen brightness adjusting method and electronic equipment. An original image which is displayed on a screen of the electronic equipment is obtained; a masking layer matched with the original image is set, and the original image is covered with the masking layer; the masking layer has preset initial transparency, and the transparency of the masking layer is adjustable; a light intensity detecting module is used for detecting the external environment to obtain light intensity parameters, and the transparency of the masking layer is adjusted in real time. In this way, due to the facts that a visual image which is seen by a user through the electronic equipment is formed by combining the original image and the masking layer, the masking layer has the preset initial transparency, the original image can be covered with the masking layer, the brightness of the original image is reduced, and stimulation on the eyes of the user by a high-brightness region in the original image can be reduced; because the transparency of the masking layer is adjusted through the detected light intensity parameters of the external environment, the original image will be not affected by external strong light and can be seen by the user clearly, and user experience is improved.