A business processing method and system, and a policy control and charging rules function. They are used to solve the problem that it cannot process distinguishably business according to policy context information when the QoS requirements are same in the prior art. The method includes: receiving the bearer priority information from the policy control and charging rules function, in which the said bearer priority information includes: the bearer priority information of the business data stream, the bearer priority information of the IP access session and/or the bearer priority information of the IP access bearer; processing the business according to the bearer priority information.