Embodiments of this application disclose a method for managing QoS, a relay terminal, a PCF network element, an SMF network element, and a remote terminal. The method includes: A relay terminal obtains QoS information from a network device, where the QoS information includes first QoS information and/or second QoS information, the first QoS information is used to transmit data of a remote terminal between the remote terminal and the relay terminal, and the second QoS information is used to transmit the data of the remote terminal between the relay terminal and a user plane function UPF network element; and the relay terminal sends the first QoS information to the remote terminal based on the QoS information. According to embodiments of this application, QoS from the remote terminal to a network side can be properly managed, and a requirement on service transmission from the remote terminal to the network side is ensured.