As a special method,temptation investigation play an effective role in criminal cases with unclear victim.In practice,temptation investigation incredibly brings about negative effect,which attracts attention from justice and law fields.This article targets at analyzing the historical revolution,concept definition and world legislation trend of temptation investigation,and analyzing the value of temptation investigation.Based on the current condition of temptation investigation,it blueprints the legislation of temptation investigation in China.