Full-automatic fishing method and fishing device based on shooting of fish finder

The invention provides a full-automatic fishing method and device based on shooting of a fish finder, and the method comprises the steps: transmitting a light refraction signal to a laser scanning part after a light sensing element of the fish finder receives light refraction, carrying out the laser scanning through a lens of the fish finder, setting a scanning region as a two-dimensional detection image, obtaining all fish school main bodies in the two-dimensional detection image, and carrying out the photographing of the fish school main bodies. The wavelength of the light signal is calculated according to the photosensitive element, so that each fish school is accurately positioned, the calculated positioning wavelength signal is transmitted to the automatic fishing starting end, the fish school in the two-dimensional detection picture is screened through the automatic fishing starting end, and fish school information is compared in a preset library. According to the automatic fishing device, the fish scho