Abstract: The property crime including intention of illegal possession in criminal law is one kind of the purported criminals.Discussion to illegal possession must based on the theory of purported criminals.The components of the purported criminals including the objective conditions subjective elements extra subjective element i.e the intention,so judgment a behavior person if violate these criminals must first know whether there is special intention.In practice,just because the difficult to intent judicial identification makes the economic cases implicit to deal with.on this account,it is necessary to explore the proving methods of the subjective intention existence.The judicial presumption is an effective way to solve the intent identification.