Focusing control method, device and system and storage medium

The invention provides a focusing control method, device and system and a storage medium, and belongs to the field of control. The focusing control method comprises the following steps: controlling a carrying platform carrying a display panel to move along a preset direction at a preset speed; controlling the distance measuring sensor to measure a first distance between the distance measuring sensor and a detection point, wherein the detection point is a point located at a preset distance measuring position on the surface of the display panel; when the detection point reaches a preset image acquisition position in the visual field of the image acquisition device, adjusting the distance between the image acquisition device and the detection point according to the first distance, so that the distance between the image acquisition device and the detection point is the focusing distance of the image acquisition device; and controlling the image acquisition device to perform image acquisition on the surface of the display panel.