Ye Lang's new bookmaking, ”Aesthetic Principle” using ”Yi xiang” as the noumenon to clarify the basic issues of Aesthetics and establish the aesthetic theory system which takes ”Yi xiang” as the core. It not only responses and settles some cutting-edge aesthetic problems which are concerned by the academia, but also makes people realize profoundly the relationship of aesthetics and life; meanwhile, it reveals the connection between aesthetics and the promotion of pneuma. The publication of Ye's book, is one of the most significant impetus of construction of China's contemporary aesthetic principle.