This invention provides a service quality authorization method including: A, after an applied function module receives the trigger for beginning new sessions, it decides service information and sends a service authorization request to a strategy decisive function module, B, said module receives said request to decide a service quality authorization strategy and sends it to a service support node,which can provides end-to-end QoS plan to the second activated UTRAN network lacking the PDP context not necessary for the terminals to support token.