A policy control function determining method, applied to a process in which a terminal accesses a network, wherein the method comprises: receiving (S101), by a first access and mobility management function, policy control function identification information from a second access and mobility management function, wherein the policy control function identification information comprises identification information of at least one first policy control function, the first access and mobility management function is an access and mobility management function providing a service for the terminal to access a network this time, and the second access and mobility management function is an access and mobility management function providing a service for the terminal to access a network last time; determining (S103), by the first access and mobility management function, a target policy control function based on policy control function information, wherein the target policy control function is not comprised in the at least one first policy control function, wherein the policy control function information comprises identification information of at least one second policy control function, and wherein the policy control function information is obtained by the first access and mobility management function from a network function repository function, or the policy control function information is stored in the first access and mobility management function; and sending, by the first access and mobility management function, first indication information to the second access and mobility management function, wherein the first indication information indicates the second access and mobility management function when receiving a terminal context management deletion notification from a unified data management function, to delete, based on the first indication information, a terminal context stored in the second access and mobility management function and request deletion of a terminal context stored in the at least one first policy control function. receiving (S101), by a first access and mobility management function, policy control function identification information from a second access and mobility management function, wherein the policy control function identification information comprises identification information of at least one first policy control function, the first access and mobility management function is an access and mobility management function providing a service for the terminal to access a network this time, and the second access and mobility management function is an access and mobility management function providing a service for the terminal to access a network last time; determining (S103), by the first access and mobility management function, a target policy control function based on policy control function information, wherein the target policy control function is not comprised in the at least one first policy control function, wherein the policy control function information comprises identification information of at least one second policy control function, and wherein the policy control function information is obtained by the first access and mobility management function from a network function repository function, or the policy control function information is stored in the first access and mobility management function; and sending, by the first access and mobility management function, first indication information to the second access and mobility management function, wherein the first indication information indicates the second access and mobility management function when receiving a terminal context management deletion notification from a unified data management function, to delete, based on the first indication information, a terminal context stored in the second access and mobility management function and request deletion of a terminal context stored in the at least one first policy control function. <EOS>