A system to deliver a cargo using a railway, such as a subway or a national railway, rather than ground transportation. A cargo loading/unloading unit is provided on a platform of a railway station. The cargo loading/unloading unit is configured to load and unload cargoes is provided inside a railway vehicle, such that a large quantity of cargo can be quickly loaded and unloaded while the railway vehicle is stopped at the station. The cargo delivery capacity can also be adjusted, thereby enabling a large quantity of the cargo to be delivered more quickly and conveniently.