Abstract: Ecosocialism gives the people a vivid picture that human being live harmoniously with nature.However,because of its latent defect and contradiction,the theory embodies a strong identity of Utopia.The roots lie in the following factors: the ecosocialism hesitates between "ecological" ideal and "human" regards;though it keeps some "socialism" principle,it departs from the essence of scientific socialism;it hesitates and contradicts in expounding the main forces of realizing the ecosocialism societ..