Abstract: Taking nature ontology as its promise,practice ontology is a social ontology which illustrates that human beings,their social existence as well as the ways of social existence is the ontology of social practice.Practice aesthetics,based on practice ontology,is aesthetics of higher stage.Practice is a philosophical category of relationship.It has surpassed traditional philosophy and the metaphysics in aesthetics and cleared up the dual conflicting thinking mode between subject and object,exploring the existence of beauty and the way of it in the relationship between subject and object,between subjects and objects as well,making aesthetics a science of human beings to appreciate beauty.Therefore,beauty and the appreciation of beauty is the relationship property,value property,and free creation grown up in social practice.The relationship of practice is also its inter-relationship,covering the inter-relationship between subject and object,the inter-relationship between subjects,and the inter-relationship between objects.They develop into the beauty of nature,the beauty of society,the beauty of art and the appreciation of them.

Key words: practice, practice ontology, relationship, inter-relationship, beauty, appreciation of beauty