Abstract: The network management control is a process that makes network high-efficiency. SNMP is the most popular network management. Its key is the group of objects that was stored in management agency and controlled by management station. ASN.1 defines and encodes the objects. All of objects are in MIB. OPC(OLE for Process Control) provides standard interface for different equipment. It makes it easy to obtain information from other equipment. This is the basis for ethernet control.