A smart log file management device includes: a memory and a processor electrically connected to the memory, the processor being configured to: create a system log message containing information about an update to a folder or a file in the folder, if the folder or file is updated by a user terminal; create a user log message containing information about the user related to the update to the folder of file; and create a smart log message containing association analysis information which is statistical information obtained by analyzing either or both of the system log message and the user log message.