A parameter determining method for a control device and a related device are disclosed, to automatically determine an image adjustment parameter of a collection device. The method includes: controlling poses of a plurality of pan-tilt-zooms, causing lenses of N collection devices on the plurality of pan-tilt-zooms to point to a target subject in a target area, where the N collection devices are arranged around the target area, and N is a positive integer greater than 1; obtaining N images, where each of the N images is a frame of image collected by each of the N collection devices for the target subject; and determining image adjustment parameters of the N collection devices based on skeletal features extracted from the N images, and the image adjustment parameters are used to obtain the frame image of the free viewpoint video.