Abstract: Carlson’s affirmative aesthetics claimed that all in nature possessed the same beauty.Based on Walton’s aesthetic theory，Carlson created new aesthetic category for nature with science，avoiding grading in art appreciation，thus it contained inner logic.Affirmative aesthetics possessed deeper aesthetic motivation that was to save the nature and criticize human being’s occupation of nature.Since 1800s，the traditional view of aesthetic appreciation has cast away the nature itself，only taking man as its norm.Affirmative aesthetics，though in accordance with inner and outer logic，contained antinomy itself：it bore nature as its precondition，and it was only an ideal consumption that the nature returned to itself without human vision.The antinomy of affirmative aesthetics was rooted in the dual opposing view of nature which Carlson tried to surpass in vain.

Key words: nature, Carlson, affirmative aesthetics