To safely provide a system capable of crushing coal, particularly the coal with much of volatile portion at a low cost.

The coal crushing system 1 includes a storage tank 2 that stores the coal, a superheated steam generator 3 that generates superheated steam, a crusher 4 that crushes the coal W fed from the tank 2 while introducing the superheated steam S fed from the generator 3 as a conveying fluid, and a dust collector 7 that separates and collects micronized coal W' crushed by the crusher 4 from the superheated steam S' that is the conveying fluid.