Abstract
A method for transmitting quality of service (QoS) during a handover process between systems and a network system and a destination network thereof are provided which enable the QoS to be transmitted to a second access network during a handover process of a user equipment (UE) between systems. The method comprises: a mobility management network element of the second network acquires QoS of a UE during a handover process of the UE from a first network to a second network; and the mobility management network element of the second network transmits the acquired QoS to the access network of the second network and/or a user plane network element.