To prevent reduction of productivity by water-spraying while preventing scattering of a dust generated accompanying with a crushing work by water-spraying in a crusher and a water-spraying control method for the crusher.

The crusher is provided with a crushing apparatus 11 for crushing an object to be crushed in a crushing chamber; a crushing state detection means C for detecting the crushing state of the crushing apparatus 11; a water-spraying apparatus 60 for spraying water to the object to be crushed crushed by the crushing apparatus 11; and a water-spraying control apparatus 70 for operating the water-spraying apparatus 60 according to the operation state of the crushing apparatus 11 detected by the crushing state detection means C.