Regarding music as a type of sign is the basic theoretical premise of music semiotics.Although different theorists have adjusted their concepts and methods because of the particularity of “musical signs”and emphasized the significance of “aesthetic intuition” to music,music is,according to heir logical analysis of music, obviously still considered as a sign which needs to be understood and recognized under rational interpretation. Thus,music aesthetic activity is defined as a rational cognition activity via signs.In view of this perspective,this paper points out that the recognition of signs and the aesthetic intuition of music belong to two kinds of human activities with different natures.The value of signs is instrumental,while the essence of the aesthetic intuition of music is the directly experience of hearing,and the value of music as an intuitive object is purposeful. The intuitiveness and purposefulness of music aesthetic activity should not be confused with the indirectness and instrumentality of signifying thinking.This is the key issue that we need to pay attention to when we research and rethink about the theory of music semiotics.