PACKAGE DELIVERY METHOD, PACKAGE DELIVERY SYSTEM AND DELIVERY MANAGEMENT DEVICE

In order to reduce a burden of receiving a package for a recipient, provided is a package delivery method including: receiving, by a first unmanned delivery vehicle, authentication information input by a user; and unlocking, by a second unmanned delivery vehicle, a key of a storage of the second unmanned delivery vehicle, which stores a package addressed to the user, based on the authentication information received by the first unmanned delivery vehicle.