The embodiment of the invention relates to a power supply processing method which includes the following steps: a chip monitors the power capacity of a lens system; when the power capacity is within a first threshold range, the power supply mode of the lens system is a continuous adjustment mode, and the chip generates continuous control data according to distance data sent by a distance measuring element to make a film zoom continuously; when the power capacity is within a second threshold range, the power supply mode of the lens system is a piecewise adjustment mode, and the chip looks for a matching preset distance threshold range according to distance data sent by the distance measuring element, and generates piecewise control data according to a preset distance threshold range found to make the film zoom piecewise; when the power capacity is within a third threshold range, the power supply mode of the lens system is a power saving mode, and the chip makes a gas-liquid control valve block a liquid delivery tube so as to fix the focal length of the film; and when the power capacity is within a fourth threshold range, the power supply mode of the lens system is a closed mode, and the chip makes the power supply stop supplying power.