A workpiece inspection method comprising: a capture step of using a ring-shaped light source to illuminate a workpiece to be inspected so as to capture an image of the workpiece, wherein, the workpiece has an arc-shaped curved surface, the arc-shaped curved surface faces the ring-shaped light source, the ring-shaped light source is inclusive of a plurality of ring-shaped sub-light sources (4, 5, 6) arranged in sequence along a direction from being close to the workpiece to being away from the workpiece, and the plurality of ring-shaped sub-light sources (4, 5, 6) emits light of different colors; an image processing step of performing image processing on the captured image so as to obtain a plurality of image regions (I 1, I 2, I 3), wherein, the plurality of image regions (I 1, I 2, I 3) has different colors, and the colors of the plurality of image regions (I 1, I 2, I 3) correspond to the colors of the light emitted from the plurality of ring-shaped sub-light sources (4, 5, 6); and an input step of obtaining image feature parameters of the plurality of image regions (I 1, I 2, I 3) and inputting the image feature parameters of the plurality of image regions (I 1, I 2, I 3) into a predetermined workpiece quality inspection model so as to acquire a quality inspection result of the workpiece, wherein each of the ring-shaped sub-light sources (4, 5, 6) comprises a plurality of light-emitting diodes arranged in a plurality of ring-shaped arrays, wherein a radius of each of the ring-shaped arrays increases along the direction from being away from the workpiece to being close to the workpiece, and wherein the ring-shaped light source includes: a first ring-shaped sub-light source emitting red light; a second ring-shaped sub-light source emitting green light; and a third ring-shaped sub-light source emitting blue light, and wherein the image feature parameters of the plurality of the image regions (I 1, I 2, I 3) include: a distance between an actual center of gravity and a theoretical center of gravity of the workpiece, determined based on the plurality of image regions (I 1, I 2, I 3); an area occupied by the workpiece in the captured image, determined based on the plurality of image regions (I 1, I 2, I 3); a distance (d) between centers of gravity of any two image regions (I 1, I 2, I 3) among the plurality of the image regions (I 1, I 2, I 3); and a ratio of areas (Ra) of any two image regions (I 1, I 2, I 3) among the plurality of image regions (I 1, I 2, I 3). a capture step of using a ring-shaped light source to illuminate a workpiece to be inspected so as to capture an image of the workpiece, wherein, the workpiece has an arc-shaped curved surface, the arc-shaped curved surface faces the ring-shaped light source, the ring-shaped light source is inclusive of a plurality of ring-shaped sub-light sources (4, 5, 6) arranged in sequence along a direction from being close to the workpiece to being away from the workpiece, and the plurality of ring-shaped sub-light sources (4, 5, 6) emits light of different colors; an image processing step of performing image processing on the captured image so as to obtain a plurality of image regions (I 1, I 2, I 3), wherein, the plurality of image regions (I 1, I 2, I 3) has different colors, and the colors of the plurality of image regions (I 1, I 2, I 3) correspond to the colors of the light emitted from the plurality of ring-shaped sub-light sources (4, 5, 6); and an input step of obtaining image feature parameters of the plurality of image regions (I 1, I 2, I 3) and inputting the image feature parameters of the plurality of image regions (I 1, I 2, I 3) into a predetermined workpiece quality inspection model so as to acquire a quality inspection result of the workpiece, wherein each of the ring-shaped sub-light sources (4, 5, 6) comprises a plurality of light-emitting diodes arranged in a plurality of ring-shaped arrays, wherein a radius of each of the ring-shaped arrays increases along the direction from being away from the workpiece to being close to the workpiece, and wherein the ring-shaped light source includes: a first ring-shaped sub-light source emitting red light; a second ring-shaped sub-light source emitting green light; and a third ring-shaped sub-light source emitting blue light, a first ring-shaped sub-light source emitting red light; a second ring-shaped sub-light source emitting green light; and a third ring-shaped sub-light source emitting blue light, and wherein the image feature parameters of the plurality of the image regions (I 1, I 2, I 3) include: a distance between an actual center of gravity and a theoretical center of gravity of the workpiece, determined based on the plurality of image regions (I 1, I 2, I 3); an area occupied by the workpiece in the captured image, determined based on the plurality of image regions (I 1, I 2, I 3); a distance (d) between centers of gravity of any two image regions (I 1, I 2, I 3) among the plurality of the image regions (I 1, I 2, I 3); and a ratio of areas (Ra) of any two image regions (I 1, I 2, I 3) among the plurality of image regions (I 1, I 2, I 3). a distance between an actual center of gravity and a theoretical center of gravity of the workpiece, determined based on the plurality of image regions (I 1, I 2, I 3); an area occupied by the workpiece in the captured image, determined based on the plurality of image regions (I 1, I 2, I 3); a distance (d) between centers of gravity of any two image regions (I 1, I 2, I 3) among the plurality of the image regions (I 1, I 2, I 3); and a ratio of areas (Ra) of any two image regions (I 1, I 2, I 3) among the plurality of image regions (I 1, I 2, I 3).