The paper analyzes the crucial issue of ecology from the perspective of political philosophy, indicating that the high speed of development of industrial civilization has accelerated the improvement of productivity on one hand, and reconstructed peoples' consumption demand and ability on the other hand. People immersed in their self indulgence in the process of practices in changing nature, the activities of whom inevitably resulted in the alienation of human being and the over-exploitation of ecology. Ecological Marxism uses the theory of justice to explore the fundamental relation of capitalist system and ecological crisis, redefining the dual value dimensions of human and nature so as to construct a new framework of social justice. By analyzing ecological justice with the dimensions of technology, economy and politics, a conclusion has been reached on the necessary underlying correlation between the capitalist system and ecological crisis- the inherent and internal contradiction within capitalism would consequentially endanger the construction of the principles on ecological justice. Therefore, it is in urgent need to create a comprehensive new pattern of justice, requiring an overall consideration on ecological, economic and social justice to reform the existing political system and world order. Meanwhile, it is necessary to evoke the transformation of the values, so as to establish an ecological civilization in accordance with the principle of justice, as well as the harmonious coexistence between human and nature.