At last,the article interprets and stresses the epistemology meaning of this mode.

The epistemological significance of investigating the lagging effect lies in: it is an important evidence of the di alectical determinism; an important foundation of the knowledge with relativity; an important reason of the practicing standard with uncertainty; an important subject of insisting on practicing concept of science and developing concept.

In the paper, the author proves that the confirmed and developed Marxist philosophy on the principle of information theory proving the unity of the matter world and the contents of the artificial intelligence substantiating and deepening dialectical materialism consciousness theory and knowledge theory.