Scanning method and device with automatic brightness adjusting function and electronic device

The embodiment of the invention provides a scanning method and device with an automatic brightness adjusting function and an electronic device. The method comprises: acquiring an object image of a scanned object under the current environment brightness; calculating the image brightness of the object image according to a preset calculation strategy, and judging whether the image brightness is within a preset brightness range or not; if the image brightness is within a preset brightness range, calculating a brightness adjustment value of ambient brightness; adjusting the ambient brightness according to the brightness adjustment value and a preset adjustment strategy; and scanning the scanned object based on the adjusted ambient brightness. In this way, the brightness of the object image canbe calculated through the preset calculation strategy. When the brightness needs to be adjusted, the adjustment brightness value of the environment brightness is calculated, the environment brightnessis adjusted in combinatio