Abstract: A moving thing recognition system using a camera on a path that the moving thing (such as a train, vehicle or ship) is proceeding, in which a check aligning device is used to align each picture file of the moving thing with virtual checks to compare for the body type and speed of the moving thing. The virtual checks of the moving thing are provided in taking the length of a fixed marking article or some other fixed article on the path of the moving thing as a reference. Thereby, under the circumstance that the path of the moving thing is unchanged and there is no emitted signal, accurate recognition can be obtained.