1. An executing system of an intelligent rule base service (IRBS) applicable for processing a service request content transmitted from a rule base service module, comprising: a rule base service interface for receiving the service request content, wherein the service request content includes a header which records each content characteristic of the service request content; a rule base for storing more than one rules; a rule component for obtaining a proper rule from the rule base according to the header, and transmitting a part of the service request content needed to be processed, the proper rule obtained previously, and a service trigger signal; and a rule application component for receiving the part of the service request content needed to be processed and the proper rule according to the service trigger signal, and applying the received rule to the part of the service request content needed to be processed so as to obtain and output a processing result for use.