Thoreau has made a landmark contribution in the history of American literature on nature, and his writing of nature is full of the earth’s real flavor. Transcendentally, Thoreau views nature as a spiritual subject, emphasizing the independent value and aesthetic significance of nature. Thoreau’s writing on nature not only reflects the intimate and flesh relationship between himself and nature, but also shows the transcendental wonders of nature. Thoreau is a real practitioner of transcendentalism.