The present invention discloses a method, a system and an apparatus for reserving network resources. The network resource reservation method includes: directly receiving, from a mobility management control function (MMCF), a request for resource reservation on a target transport path; controlling a transport function to reserve network resources on the target transport path according to the resource reservation request; and returning a result of the network resource reservation to the MMCF. The technical solution of the present invention enables advance resource reservation on a target transport path before a network handover occurs, when a user is moving.