The United States has long been criticized for its rejection of the Kyoto Protocol and failing in the issuance of a national climate change action plan. This situation has been changed in President Obama's second term. In June 2013,Obama Administration promulgated The President's Climate Action Plan, which is regarded as the most comprehensive national plan at the federal level to address climate challenge. By summarizing main contents of the action plan, this paper identifies key factors that have driven the policy development from the domestic and international perspectives. It concludes that the adoption of the action plan contributes to the integration of administrative resources, the revision of national climate strategy, and the enhancement of its political impacts. Besides, the event may also help the U.S. reverse the disadvantageous position and reshuffle it as a new leader in the global climate negotiations.