A linkage policy implementation method, comprising: Receiving, by a linkage proxy module, a linkage policy request delivered by a third-party application service; calling, by the linkage proxy module, a corresponding protocol converter according to a protocol identifier in the linkage policy request, and performing protocol conversion for the linkage policy request to convert it into a linkage policy request in a set protocol format; adding, by the linkage proxy module, an application identifier to the protocol-converted linkage policy request, wherein the application identifier corresponds to the third-party application service delivering the linkage policy request; sending, by the linkage proxy module, the protocol-converted linkage policy request carrying the application identifier to the linkage client to instruct the linkage client to parse the linkage policy request based on the set protocol and execute linkage policy configuration; receiving, by the linkage proxy module, a linkage policy response generated by the linkage client for executing linkage policy configuration, where the linkage policy response carries the application identifier; and calling, by the linkage proxy module according to the application identifier comprised in the linkage policy response, a corresponding protocol converter to perform protocol conversion for the linkage policy response, and returning the protocol-converted linkage policy response to a corresponding third-party application service. Receiving, by a linkage proxy module, a linkage policy request delivered by a third-party application service; calling, by the linkage proxy module, a corresponding protocol converter according to a protocol identifier in the linkage policy request, and performing protocol conversion for the linkage policy request to convert it into a linkage policy request in a set protocol format; adding, by the linkage proxy module, an application identifier to the protocol-converted linkage policy request, wherein the application identifier corresponds to the third-party application service delivering the linkage policy request; sending, by the linkage proxy module, the protocol-converted linkage policy request carrying the application identifier to the linkage client to instruct the linkage client to parse the linkage policy request based on the set protocol and execute linkage policy configuration; receiving, by the linkage proxy module, a linkage policy response generated by the linkage client for executing linkage policy configuration, where the linkage policy response carries the application identifier; and calling, by the linkage proxy module according to the application identifier comprised in the linkage policy response, a corresponding protocol converter to perform protocol conversion for the linkage policy response, and returning the protocol-converted linkage policy response to a corresponding third-party application service. adding, by the linkage proxy module, an application identifier to the protocol-converted linkage policy request, wherein the application identifier corresponds to the third-party application service delivering the linkage policy request; sending, by the linkage proxy module, the protocol-converted linkage policy request carrying the application identifier to the linkage client to instruct the linkage client to parse the linkage policy request based on the set protocol and execute linkage policy configuration; receiving, by the linkage proxy module, a linkage policy response generated by the linkage client for executing linkage policy configuration, where the linkage policy response carries the application identifier; and calling, by the linkage proxy module according to the application identifier comprised in the linkage policy response, a corresponding protocol converter to perform protocol conversion for the linkage policy response, and returning the protocol-converted linkage policy response to a corresponding third-party application service.