Embodiments of the present application are related to a method and apparatus for indicating QoS flow information. A method according to an embodiment of the present application includes: mapping at least one data packet to a QoS flow, wherein the QoS flow is associated with a set of QoS parameters; mapping the QoS flow to a sidelink radio bearer (SLRB) based on index configuration information, wherein the index configuration information indicates a set of indexes associated with each QoS parameter of the set of QoS parameters; and transmitting configuration information of the SLRB and mapping index information, wherein the mapping index information indicates a quantization index of each QoS parameter of the set of QoS parameters, and the set of QoS parameters is quantified to the mapping index information based on the index configuration information.