The electric power dispatch center needs to diagnose and manage the computer system effectively. Making use of Internet Control Message Protocol (ICMP) message for the diagnosis carries out low efficiency. By sending Address Resolution Protocol (ARP) packet using the Network Driver Interface Standard (NDIS) protocol driver to the destination computer and parsing the ARP packet with the NDIS protocol driver can detect the link status quickly. The ARP packet and the structure of NDIS are introduced. The realizing procedure and the flow chart of the program are described. The NDIS driver program and application program as well as the testing program based on ICMP are designed. The test results demonstrate that the method proposed is efficient and precise in the link status detection and can satisfy the request.