A method for Ethernet Operation Administration and Maintenance, OAM, detecting, the method performed by a telecommunication network management system or an element management system, and the method comprising: sending (S101, S401) a detection maintenance entity OAM command to a network element equipment board after a user activating an established maintenance entity; receiving a reply message sent by the network element equipment board and acquiring (S102, S403) replying board information and monitoring Identifier, ID, information matched with the maintenance entity; starting (S102, S404) a timer; and detecting (S103, S405) whether a preconfigured heartbeat detection period is reached: if the preconfigured heartbeat detection period is not reached by the timer, detecting (S104, S410) whether an OAM detection result which is reported by the network element equipment board and is matched with a monitoring ID is received, and if the OAM detection result is received, transferring (S104, S411) the OAM detection result to a network management interface to be displayed; if the preconfigured heartbeat detection period is reached by the timer, sending (S103, S406) a heartbeat detection message, and detecting (S104, S410) whether the OAM detection result which is reported by the network element equipment board and is matched with the monitoring ID is received after receiving a heartbeat reply message, and if the OAM detection result is received, transferring (S104, S411) the OAM detection result to the network management interface to be displayed. sending (S101, S401) a detection maintenance entity OAM command to a network element equipment board after a user activating an established maintenance entity; receiving a reply message sent by the network element equipment board and acquiring (S102, S403) replying board information and monitoring Identifier, ID, information matched with the maintenance entity; starting (S102, S404) a timer; and detecting (S103, S405) whether a preconfigured heartbeat detection period is reached: if the preconfigured heartbeat detection period is not reached by the timer, detecting (S104, S410) whether an OAM detection result which is reported by the network element equipment board and is matched with a monitoring ID is received, and if the OAM detection result is received, transferring (S104, S411) the OAM detection result to a network management interface to be displayed; if the preconfigured heartbeat detection period is reached by the timer, sending (S103, S406) a heartbeat detection message, and detecting (S104, S410) whether the OAM detection result which is reported by the network element equipment board and is matched with the monitoring ID is received after receiving a heartbeat reply message, and if the OAM detection result is received, transferring (S104, S411) the OAM detection result to the network management interface to be displayed. if the preconfigured heartbeat detection period is not reached by the timer, detecting (S104, S410) whether an OAM detection result which is reported by the network element equipment board and is matched with a monitoring ID is received, and if the OAM detection result is received, transferring (S104, S411) the OAM detection result to a network management interface to be displayed; if the preconfigured heartbeat detection period is reached by the timer, sending (S103, S406) a heartbeat detection message, and detecting (S104, S410) whether the OAM detection result which is reported by the network element equipment board and is matched with the monitoring ID is received after receiving a heartbeat reply message, and if the OAM detection result is received, transferring (S104, S411) the OAM detection result to the network management interface to be displayed.