The utility model discloses a fishing device capable of automatically selecting a fishing species. The fishing device comprises a net cage arranged under water and is characterized in that an opening is formed in the side of the net cage, an opening door controlled by an electric lock catch to be closed is arranged in the opening, the opening door is used for closing the opening, a video camera is arranged behind the rear side portion of the net cage, the video camera and the electric lock catch are connected with a control device arranged on a water carrier through a cable, and the control device is used for receiving video signals of the video camera, conducting image recognition and outputting control signals to control the electric lock catch to work. According to the fishing device, by the adoption of the image recognition technology, video collection is carried out on fish swimming into the net cage, and the collected fish images are compared with stored dish feature images; when it is determined that the needed fish swims into the net cage, the net cage is closed, and the fish of the designated species is automatically caught. According to the fishing device, the fishing manpower is lowered, and meanwhile it is ensured that the fish of the needed species can be caught.