The invention provides a method for detecting the frequency of an LED light source based on a camera of mobile equipment, and the method comprises the steps: carrying out the modulation of a drive current or drive voltage of the LED light source, i.e., changing the frequency of the LED light source, and obtaining a plurality of bright and dark stripe images at an output end of an image sensor; detecting the width of a pair of bright and dark stripes of the bright and dark stripe images, which indicates that the change rule of pixels in each line of the photographed bright and dark stripe images is periodic, i.e., determining the ratio of the line scanning frequency of the camera of the mobile equipment to the width of one pair of bright and dark stripes as the frequency of the LED light source. Through the combination of different LED frequencies, the method can obtain the position information of the LED light source, and improves the positioning stability and reliability of the LED light source.