Under the assumption that Hawthorne`s description of nature expands into a religious and theological dimension, this paper attempts to investigate the eco-theological consciousness reflected in the poems and notes of Nathaniel Hawthorne. Seen from the ecological viewpoint, his works are full of various descriptions of nature. His description of nature, however, never remains within a boundary which keeps just a friendly relationship with nature. Instead, he lifts it up to a religious dimension, admiring nature`s mystery, listening to God`s message, realizing God`s providence, and trying to solve the ultimate problem of human beings. In this respect, his view of nature encounters with eco-theologians` view of nature. First, this paper examines how Hawthorne`s peculiar view of nature was formed; then it surveys the contents of eco-theology. And finally it investigates how the eco-theological principles and ethics are fused in the works of Nathaniel Hawthorne by dividing them into six items: a) nature as Mother, b) consecrated nature, c) wisdom from nature, d) a teleological understanding on creation, e) a moderate life, f) a communal life.