A call management system is configured of a client terminal 200 and a management server 100. The client terminal 200 executes a presence detection process by communicating with a call device 50 and acquiring presence information including a user ID, and a presence transmission process of transmitting, to a management server 100, presence information including the presence information of the detected user and the ID of the client terminal 200 itself. The management server 100 executes a presence acquiring process of receiving the presence information and storing the information in a user management table; a coupling destination reading process of, upon receipt of a call originated by a communication terminal 30, reading the presence information of a user corresponding to a telephone number of a call destination and information on an assigned client server 300, from the user management table as coupling destination information; and a coupling request process of transmitting, to the assigned client server 300, a call coupling request which includes coupling information of the communication terminal, and which requests establishment of a call between the communication terminal 30 and the call device 50.