A method for determining quality of service (QoS) description information includes receiving at least one piece of QoS description information of a service. Each piece of the at least one piece of QoS description information includes parameter type information and a parameter requirement. The method also includes sending to a second core network element or an application function network element corresponding to the service, parameter type information and a parameter requirement in the at least one piece of QoS description information. The method further includes receiving from the second core network element or the application function network element, feedback information of the parameter type information and the parameter requirement. The method additionally includes determining at least one piece of target QoS description information in the at least one piece of QoS description information based on the feedback information.