Abstract: The developing course of aesthetics ontology has undergone three stages in the history of aesthetics,which is ultimately moving towards the stage of the unity of object and subject that accords with the specific characteristics of aesthetics after the two stages of subjects and objects as its mainstreams.The reason for this ultimate pattern is because the logical starting point of aesthetics ontology does not rely on the monistic ontology but on the unified relation that conveyed by the duality of subjects and objects.It is of great significance on many problems of aesthetics especially on the current discussion on the transformation of aesthetics ontology to beinglogy aesthetics to recognize clearly the particularity and development of aesthetics ontology.

Key words: aesthetics ontology, unified by object and subject, beginning ontology, regenerating ontology, beinglogy aesthetics