In the circulatory system of urban construction, the interrelations in the public art system are not static but dynamic. People often participate, whether they are aware of it or not, in the creative process of public art. “Much of our time is spent in various architectural spaces. We do not only aim for convenience or practicality when building a house or mapping out a landscape, we also hope to create a more pleasant and artistically appealing environment to fulfil our spiritual and psychological yearning for beauty.”[18] Cultural diversity, through which our contemporary is characterized, gives rise to various new cultural concepts and thoughts for architecture and open space. People are thus driven to create a public art space with life of its own. To ensure this new life can grow and thrive, the dynamics of public art in the public space has been brought into attention. While the development of the public art system is explored with reference to the concept of dynamic space in the contemporary era, research has also been conducted to investigate how the form of art in the public art system fashions and flourishes in a dynamic space. The form of art of the public art system existing within the contemporary circulatory system of urban construction and the novel concept of dynamic urban spatial relations can be better understood with the knowledge of urban construction and the dynamics of the public art system.

　　The dynamic elements of the public art system, studied under the lens of systems theory, are particularly valuable to the creative art activities for urban development and the research on aesthetics theory.

　　Fig 4 The Dynamic of Public Art Development　　

　　5. The Sequency of Public Art

　　The development of the circulatory system of urban construction is enhanced by time sequence, which is also the reason why characteristics of systems theory are used, in this essay, to examine the public art system. Public art progresses from a formless condition to a sequential construction. Along the long corridor of history, the public art system has gradually taken shape, in terms of both planning and building, in the circulatory system of urban construction.[19]

　　The orderly state of urban construction sets the pattern for sequential urban development derived from the macro urban construction and the micro public art elements. As Bertalanffy suggests, the disintegration of a system is defined by the absence of order. If the macro urban construction and the micro public art elements are to be situated in a state that lacks order, it is impossible to establish the public art system.

　　6. The Teleology of Public Art　　

　　New Mankind·Red 27

　　Teleology is how people design their intended goal or ends conceptually before making a move and reflects the human capacity for voluntary motivation.[20] Bertalanffy reasserts the commonality of this feature as it can be found easily in the urban public art system or systems of other types. Teleology sees the practice from its beginning to its end. Both its birth and implementation have to be performed in an objective world and are restricted by certain historical circumstances, so that the subject can alter the activity of the object. Teleology expresses itself in all kinds of human activities with clear directions and orientations in a complicated, extensive, manifold and diversified urban society. “Each model includes its own criteria, as well as its own view of the world, and these concepts are related to each other. We uncover such values as viability, uniqueness, complexity, balance, stability, the status quo.”[21] The purpose of constructing urban public art is to improve the development of public art in an urban setting and illustrate the image of the city, so that the need for daily practicality and the psychological craving for beauty of the public can be fulfilled when enjoying the cultural benefits of public art initiated by the government.

　　The study of the public art system theory is facilitated by the principles of systems theory broken down by the laws of general system theory. The new angle can initiate and enhance the gradual theorization of the city public art system. (See Table) The ultimate goal is to research on how urban public art can bring more and better cultural benefits to the public.

　　Table The application of general system theory on the public art system