A communication management system includes: a communication unit that respectively communicates with an information terminal belonging to one of a plurality of groups, via a communication channel assigned to the group to which the information terminal belongs, from among a plurality of communication channels; a control unit that controls a communication via the communication channel on the basis of a configuration value of bandwidth on the communication channel; and a bandwidth configuration unit that, for each communication channel, configures the configuration value of bandwidth on the communication channel, on the basis of data indicating time transitions of communication traffic volume of the group to which the communication channel is assigned.