The Australian Federal Election in 2016 ends with the result that the Coalition won the majority in the house but not at the senator. Other parties including the Greens could bargain with the Coalition over the disputes at the Senator under the political system. Climate change agenda is one of the most important agenda in Australian Council politics. The Australian Greens，in the two-party structure consisted of the Labor party and the Alliance Party，is the most powerful party among the small parties in this agenda. The main content of this paper is to discuss the role of the Australian Greens in three parts of the climate change agenda. The conclusion is that the Australian Greens play a positive role in climate change problem identification，a participant role in climate change policy and facilitator role in climate change politics. “The Green Label” and “The Green Dilemma” are the two factors that can explain the role of the Australian Greens in Climate Change Agenda.