The invention discloses a monitoring system and method of load balance. The method is applied to a grid monitoring system including a provincial master station monitoring system, a regional master station monitoring system, an end station monitoring system, two backbone networks, a plurality of servers, a server load comparing module and a network switch, wherein the two backbone networks are used for connecting the provincial master station monitoring system and the regional master station monitoring system as well as the regional master station monitoring system and the end station monitoring system; each server is connected with the two backbone networks and used for processing monitoring information interaction and storage of the monitoring system; the server load comparing module is arranged in the servers for comparing the load conditions of the servers; and the network switch is used for connecting the two backbone networks. The invention can not only realize the load balance of the grid monitoring system and the utilization optimization of the resource transmission, but also find out the faults of the servers or network cards in time to add the link redundancy of the monitoring system, thereby ensuring the stable and reliable operation of the monitoring system to the maximum extent.