The invention provides a method for controlling a mobile phone camera. Analog electrical signals output by a first photosensitive element are converted into digital signals through a first DA converter. Image signals output by a first camera are received through an image processing module and are converted into digital signals. The digital signals of the first DA converter are received through a dimming module, and dimming signals are output according to a pre-stored data table. The output signals of the image processing module and the output signals of the dimming module are synthesized through an image synthesizing module, the image signals of the first camera and the dimming signals of the first photosensitive element are synthesized, and the image signals obtained after dimming is carried out are output.