An automatic system for inspecting a cutting edge of a ring shaped blade. An example system includes one supporting and moving group rotatably mounted around one rotation axis and configured to support the ring shaped blade between at least one parking position and at least one reading position, one first emitting unit configured to emit at least one first inspection light beam, one second emitting unit configured to emit at least one second inspection light beam, one first detecting unit configured to detect a first light beam reflected from the ring shaped blade, and one second detecting unit configured to detect a second light beam reflected from the ring shaped blade, and one control and processing unit configured to receive an input and process at least one detection signal and output at least one quality index of the cutting edge of the ring shaped blade.