The invention provides a next generation broadcasting network (NGB) access network architecture system and a butt joint method of an Ethernet over coax (EOC) network management system and a business operation support system (BOSS). The NGB access network architecture system comprises a business management system, an authentication management system connected with the business management system, a call-center system connected with the authentication management system, three China national ratio (CNR) servers which are connected with the authentication management system and respective serve customer terminal equipments with the types of cable modems, personal computers and set top boxes, and a simple network management protocol (SNMP) management system which is connected with the authentication management system and used for carrying out SNMP configuration on the various customer terminal equipments; and the architecture system also comprises a butt joint management system used for taking part in the butt joint with the authentication management system so as to complete authentication, optical line terminal management equipment connected with all the CNR servers and the SNMP management system, EOC local side management equipment connected with the optical line terminal management equipment, and customer terminal access equipment connected with the EOC local side management equipment. The architecture system and the butt joint method enable all EOC access technologies to be suitable for the BOSS, thus reducing the butt joint cost and the technical risk, and reducing the access difficulty.