Artificial　intelligence　is　an　emerging　science,　which　studies　and　develops　theoretical　methods　and　techniques　for　simulating　and　expanding　human　intelligence.　Today,　artificial　intelligence　has　made　significant　achievements　in　pattern　recognition,　knowledge　engineering,　robotics,　etc.　But　it　is　far　from　the　real　human　intelligence.　Based　on　the　elaboration　of　the　concept　of　artificial　intelligence,　this　study　analyzes　the　development　history,　the　current　applicable　fields　of　artificial　intelligence,　and　looks　forward　to　the　future　development　trend.　Meanwhile,　we　discuss　the　ethical　dilemma　faced　or　about　to　be　faced　by　artificial　intelligence　technology.