The invention relates to the routing forwarding technique. The invention provides a network access apparatus upgrade system and network access apparatus upgrade method according to the defect that theprior scheme cannot perform batch upgrades to the network access apparatus with identical management address. The system includes an upgrade console; forwarding facilities, for upgrading the consoleinterface, to connect and receive the upgrade package; a plurality of network access device interfaces respectively pertaining to different VLAN; a master control module, for extracting upgrade package destination address, and determining the destination VLAN of the upgrade package based on the destination address, to determine the destination network access device interface pertaining to the destination VLAN; using the address of the destination network access device interface and the prescribed target address to update the source and destination address of the upgrade package, and then forwarding the updated upgrade package by the destination network access device interface. The invention also provides an upgrade method. This invention can perform batch upgrades to the network access apparatus with the identical management address.