A method for selecting a policy and charging rules function entity in the non-roaming scenario includes the following steps: when a diameter routing agent DRA receives an indication message of the IP connectivity access network IP-CAN session establishment, the indication message is forwarded to a PCRF according to the related relationship which is set up and saved for allocating the policy and charging rules function PCRF entity to the IP-CAN session; and the corresponding policy and charging control PCC policy, which is made for the IP-CAN session by the PCRF, is forwarded to the provider's IP application function AF and the network element, which has policy and charging enforcement function, corresponding to the IP-CAN session.