Abstract: The present invention relates to a method (200) for diagnosing a circuit breaker comprising at least one pole, each pole comprising an electrical contact configured to switch between a closed position and an open position. The method comprises: for each pole of the circuit breaker, capturing (208A, 208B) an image of the electrical contact of the pole at least once; for each pole of the circuit breaker, determining (218A, 218B) at least once a state of pole health among at least two states by means of an artificial-intelligence algorithm, the artificial-intelligence algorithm receiving as input at least one image of the pole and delivering as output the state of pole health; determining (220A, 220B) a state of health of the circuit breaker among at least two states, depending on the state of health of each pole; and rendering (222, 224) the state of health of the circuit breaker.