Methods and devices are provided in which one or more identifiers are registered based on a user setting made by a user of an electronic device. Each of the one or more identifiers corresponds to at least one activated service module. A registered identifier, of the one or more identifiers, is extracted from a user command input through an input device. The user command is changed using a basic identifier preset for a first service module corresponding to the registered identifier. The changed user command is transmitted to a server configured to control execution of the first service module. A result of executing the changed user command based on the first service module is received from the server.