The present invention is a method for allowing a network system to automatically perform a configuration of a network management server without user intervention, and a method for allowing a load distribution device to manage the network management server comprises the steps of: receiving information indicating that a new base station is added to a network; transmitting the information on the new base station to at least one network management server; receiving processing time information on the new base station from the at least one network management server; and determining a network management server to which the new base station is to be allocated, on the basis of the processing time information.