A method for removing a policy and charging control rule from a default bearer, comprising: determining, by a policy control and charging rules function entity, PCRF, whether a received service flow is a service flow of Single Radio Voice Call Continuity, SRVCC, switching upon receipt of flow description information of the service flow, wherein a SRVCC switching is a process of switching by a user equipment from a circuit switching domain of a 2G/3G network to a packet switching domain of a 3G/LTE network; and if the received service flow is the service flow of the SRVCC switching, removing, by the PCRF, a policy and charging control rule that has been activated on a default bearer for the SRVCC switching, and at the same time issuing a policy and charging control rule made for a newly created bearer, which is created for the received service flow, wherein the flow description information comprises a port number of a service flow packet; and the determining whether a received service flow is a service flow of Single Radio Voice Call Continuity SRVCC switching comprises: matching a port number reserved for the SRVCC switching with the port number of the service flow packet comprised in the flow description information; and determining that the received service flow is the service flow of the Single Radio Voice Call Continuity SRVCC switching if the port number reserved for the SRVCC switching is consistent with the port number of the packet comprised in the flow description information. determining, by a policy control and charging rules function entity, PCRF, whether a received service flow is a service flow of Single Radio Voice Call Continuity, SRVCC, switching upon receipt of flow description information of the service flow, wherein a SRVCC switching is a process of switching by a user equipment from a circuit switching domain of a 2G/3G network to a packet switching domain of a 3G/LTE network; and if the received service flow is the service flow of the SRVCC switching, removing, by the PCRF, a policy and charging control rule that has been activated on a default bearer for the SRVCC switching, and at the same time issuing a policy and charging control rule made for a newly created bearer, which is created for the received service flow, wherein the flow description information comprises a port number of a service flow packet; and the determining whether a received service flow is a service flow of Single Radio Voice Call Continuity SRVCC switching comprises: matching a port number reserved for the SRVCC switching with the port number of the service flow packet comprised in the flow description information; and determining that the received service flow is the service flow of the Single Radio Voice Call Continuity SRVCC switching if the port number reserved for the SRVCC switching is consistent with the port number of the packet comprised in the flow description information. matching a port number reserved for the SRVCC switching with the port number of the service flow packet comprised in the flow description information; and determining that the received service flow is the service flow of the Single Radio Voice Call Continuity SRVCC switching if the port number reserved for the SRVCC switching is consistent with the port number of the packet comprised in the flow description information.