Marx’s ecological thought is the logical extension of his labor thought. Ecological problem is a problem of the relationship between human and nature and labor is an interrelated link between human and nature. As a result, Marx takes labor as a logical starting point to deduce his ecological thought. Labor is not only material transformation mediation between human and nature and is the means of material transformation to adjust and control relationship between man and nature. When the function of labor about adjustment and control lose efficacy, material transformation cracks may appear and lead to ecological crisis. Marx’s research on ecological problem has a ingenious point which reveals the social root of ecology crisis by means of the alienation relationship between capital and labor through ecological problem. Then, based on the exploration, it is possible to find reality path to deal with ecological crisis through labor liberation.