David Herman is one of the pioneers of the post-classical narratology.He has devoted himself into the career of combining narratology with cognitive science.He has studied the main issues of the classical narratology,absorbed the essence of it and promoted the development of narrative theory.Some of his theories,such as the hypothetical focalization theory,the story logic theory and the vague time concept,are very influential in the West.In the representatives of cognitive narratology,David Herman has produced the richest theoretical fruits.That is why he has been named the leader of cognitive narratology in the West.