Chinese and Western garden art are two different systems because of their different physical and culture conditions. However, both of them are important parts of the world garden. They belong to the garden because both of them have the common characteristics of the garden art. This thesis mainly discusses philosophy, mythological background, gardening elements, cultural implication and landscape art regarding Chinese and Western garden art. The traditional royal garden of Old Summer Palace and the key landscape culture heritage protection project of Daming Palace National Heritage Park in Xi'an of China are used as the examples. There are obvious differences in the category and application mode of plants in the Chinese and Western garden. For the differences in the cultural connotation, the common plants in the Chinese garden are obviously different from that of the West. In the representation of plants, there are geometric and natural modes. In the cultural context of emphasizing order and rationality, the majority of the Western gardens are geometric, such as the Italian and French classical garden. The beauty of gardens is represented through the pattern and the architectural extension. The Chinese garden art is the natural plant disposition, and it imitates nature and emphasizes similarity in spirit. As the largest protection and development project of the landscape cultural heritage since the foundation of the China, The Daming Palace National Heritage Park has aroused the awareness. To consider and reflection the Western idea of protecting the cultural heritage as the principal idea, it will be the essence that how to protect, conserve and enhance Chinese cultural heritage so to be the key features of Chinese cultur