In order to achieve the object, a communication management system includes: a surveying instrument including a survey unit, a system timer, a control unit, and a communication unit; a management server capable of communicating with the surveying instrument; and a remote terminal capable of communicating with the management server, wherein the remote terminal sets a usable time of the surveying instrument, sets determination on an operating time of the surveying instrument and the usable time, and an operation responding to results of the determination, and makes the management server store these, the surveying instrument transmits an operation start time and an operation end time to the management server, and the management server acquires the operation start time and the operation end time, and compares the usable time and an operating time of the surveying instrument and executes the determination, and executes the operation based on results of the determination.