Link detection method and system

The invention discloses a link detection method and system. The method comprises the following steps: a server program acquires a connection relationship between a service interface of a TOR switch and a service interface of each server; the server program periodically sends a query message to each client program through the network management switch; each client program responds to the query message and returns interface information of a service interface which is included in the TOR switch or the server and has a connection relationship with service interfaces of other equipment to the server program through the network management switch; and the server program reports the interface information of the service interface included in the equipment where the server program is located and having the connection relationship with the service interfaces of other equipment and the received interface information to the upper-layer program, so that the upper-layer program analyzes the connection condition of the link