Tripwire system [13] developed by Gene Kim and Gene Spafford is used to check whether the important files and directories are changed. Manager put important file or directory name into the configuration file in the manual way, while define the file properties to be examined in the strategy document. Tripwire is developed for the UNIX, so it is only measure the integrity of files and directories which are concerned. The efficiency of such a measure will be reduced in the form of large-scale file system.