LOG OUTPUT DEVICE, LOG OUTPUT METHOD AND LOG OUTPUT SYSTEM

A log output device includes a generation unit that generates a log indicating history information of execution of processing, a memory that stores a first list including first static information indicating that the processing is abnormal; a second list including second static information indicating that the processing is normal; and a third list including dynamic information to be used for determining the necessity of output of the log according to the log, and a selection unit that determines to output the generated log when the log has the first static information, and decides not to output the generated log when the log has the second static information. The selection unit determines the necessity of output of the generated log on the basis of the log and the third list.