Unnecessary emission of strong laser light is automatically prevented. Provided is a blood-vessel recognition system including: a laser-light source a blood-vessel recognition probe that has a probe body that is inserted into a body and a laser-light emitting unit that is provided on the probe body and that emits laser light supplied from the laser-light source an in-use-state determining unit that determines whether the blood-vessel recognition probe is in an in-use state in which the laser light emitted from the laser-light emitting unit is radiated onto living tissue in the body and a control unit that controls the laser-light source on the basis of a determination result obtained by the in-use-state determining unit, such that the intensity of the laser light is reduced when the blood-vessel recognition probe is not in the in-use state, compared with when the blood-vessel recognition probe is in the in-use state.
