Method and device for reflecting real-time supply information

A real-time supply information reflection method according to an embodiment of the present invention may comprise: a step of changing supply information including information about an allocable quantity by reflecting, in real time, information about a supply state change to be generated until a product is warehoused; and a step of adjusting a deadline of a quantity which is deadline-confirmed using the changed supply information in real-time whenever the supply information is changed.