This paper will address the following questions: the definition of the legal action, the differences between factual action and the other related actions, the characters and kinds of factual action from a theoretical perspective.

The author thinks favor act is not a legal act, in fact, it should be negotiorum gestio act, a kind of real act.

This article begins with the origin of artificial thing, explaining the characteristic and the category of artificial thing;and then elaborates the evolving process of writing tool and the artificial thing characteristic as the memory extends, finally to elaborate the influence of it s evolving which produced to the society.