An international mobile subscriber (IMS) parameter configuration method, comprising: an application processor in a mobile terminal acquires an IMS identification code; from a baseband processor by means of a preset command; the application processor in the mobile terminal collects IMS configuration parameters and associates a mobile country code and a mobile network code in the IMS identification code with the IMS configuration parameters; the application processor in the mobile terminal transmits the mobile country code, the mobile network code and the IMS configuration parameters to the baseband processor; and the baseband processor in the mobile terminal receives the IMS configuration parameters from the application processor and configures the IMS configuration parameters of a corresponding service provider according to the mobile country code and the mobile network code.