The invention relates to the technical field of coaxial broadband access EOC (Ethernet over coax), and provides an Ethernet port VLAN (virtual local area network) configuration system and a method of EOC (Ethernet over coax) equipment. The system comprises an EOC manage main engine, an exchanger, EOC local sides and an EOC terminal, wherein the EOC manage main engine has the function of a WEB server, responses to the VLAN batch processing management of a manager, and transmits batches of VLAN configuration information to each EOC local side through the exchanger, after batches of VLAN management configuration is finished, allocation of VLAN ID is responded and realized between each EOC local side and the EOC terminal without participation of the EOC manage main engine, so that allocation of VLAN ID is simplified, and the configuration efficiency of VLAN is greatly improved by taking the principle of firstly allowing the EOC terminal to be on line, and configuring the EOC terminal VLAN firstly.