ALERT MONITORING DEVICE AND ALERT MONITORING METHOD

An alarm monitoring device 1 that monitors, in a network which includes a plurality of transmission devices and establishes a route connecting one transmission device to another transmission device via a transmission line or via a transmission line and a transmission device other than the two transmission devices as a path, when a failure has occurred in the transmission device or the transmission line, an alarm transmitted from a transmission device that has detected the failure, the alarm monitoring device 1 including: an alarm database 14 for recording therein information included in the alarm, the information being on a detected time, a generated location, an alarm importance, and an ID of a path having the generated location as a route; and a monitoring control unit 11 configured to register information of a received alarm in the alarm database 14, extract one alarm from the alarm database 14 for each path ID based on an alarm importance and a detected time, determine the detected time as an alarm generation time, associate a path ID of the extracted alarm with the alarm generation time and the alarm importance, and cause to display the path ID as an alarm-generating path list.