J.Seale has boldly improved the traditional theory of intentionality.Based on naturalism,he thinks that intentionality has its positions in the nature,so he does not maintain reduction and simplification.And he thinks intentionality isn't the sole characteristic of mental state,because something except human beings has intentionality on the meaning of signifying,metaphor and spin-off.His theory of intentionality symbolizes the new philosophy direction,which is putting the illocutionary acts into the mental background and showing the mental intentionality by language aimed at formulating the theory of intentionality.