Resume: public art as an important media change around us and exchange way, as a form of art in the public space and city public interaction, can give the city life of the public utility function to provide food and spiritual life. While carrying the public space of city public art is people gathering, communication, shopping, relaxation and leisure places, to provide the public living platform of a city public sector, streets, squares and parks are. In early twentieth Century the era of public art, public art works all over the world each big city square, parks, buildings, schools, airports, stations, theatres, government buildings, commercial centers, including community centres, public art works every hour and moment influence people's behavior and mentality, the breadth and complexity of public art the size of the unique characteristics of all is in the city form.

The public works of art in the public space of city, the artist and audience interaction, mutual cooperation and improve the city public life of the public, if the public works of art have no interaction with the public, the real meaning of the concept of public art is not established, but works of art in the outdoor space of the display. The reason that exists in the city public space in the art works of public art, because it is the art of the public consciousness, every piece of work reflects the hidden behind the city's political and economic history, culture, sociology, anthropology, philosophy and aesthetics. Therefore, in today's era of public art, public art has become an important element and symbol of contemporary cultural characteristics and contemporary characteristics of a city.

Public art is not a single art form, but a multi functional, multi-level, multi latitude, multi form public art system concept. In the city, in addition to the construction, other urban supporting public facilities, through the art development and creation, can become the elements of public art system. Therefore, public art can be used in a variety of ways and means to achieve, such as sculpture, mural painting, painting, photography, water, landscape gardening, landscape, lighting, furniture, city construction; can also be the city landscape art, installation art, video art, art, art, high-tech optical behavior art, performing arts etc. other public facilities. The public art elements in the urban construction cycle system constitute a complete public art system, which together with the building system constitute the overall form of the city.