Aiming at the lack of versatility method on management and monitoring in cluster system, a SNMP protocol based realtime monitoring system of cluster equipment is proposed. Functions such as equipment status checking, exception alarming and alarm information receiving are integrated into a general management mechanism which can effectively avoid the problem on inconsistency of the hardware interface in the cluster system. A realtime monitoring strategy combined of checking and interruption is proposed to reduce the complexity of the monitoring system design. The test results show that the timeliness and reliability of the system is desirable.