Since the world goes into the 21st century, almost every country has been experiencing influential changes. Obviously, as the superpower of the world, anything that happened in America can cause profound influences. The occurrence of terrorism attack in America on 1 1September of 2001, the launching of invasion of Afghanistan by America on 7 October of2001, the explosion of Iraq War launched by America on 20th March of 2003, the appearance of first America's black president - Barack Obama - on 4th November of 2008, the explosion of global financial crisis on October 2008 and the death of the terrorist - Osama Bin Laden-on 2rd May of 2011, all of these have caused far-reaching influences on the world. And at the same time, America also has experienced earth-shaking changes in every field. Similarly, as the world’s biggest developing countries, China also has decisive situations in the world, plus the situation of world’s second biggest economic system, China is becoming more and more influential in the world. Therefore, the trends, cooperation and disputes of China and America are always the focus points of the world, And in recent five years, the most frequent issue proposed between these two countries is currency. Actually, it is always the sentence “to depreciate US dollar through appreciating China's Renminbi” This thesis intends to study the real intentions of America on compelling RMB to appreciate, why the American government inflicts economic, political even military pressure on China frequently, what the appreciating RMB can bring on China and America's economy and society, and what the implications of the findings for the future trend of Sino-US relation are. Since the topic is involved with currency, the best way to analyze the influences of currency is through data analysis. Through comparing the economic data of America and China, it can be easily to find the influences caused by appreciating RMB from the economic view. However, America's intention is not simply involved with economy, seen from the past experiences, frequent disputes launched by America on RMB issue are not only based on economic considerations. Through case analysis, political factors can also be found in the disputes. Therefore, qualitative and quantitative methods will be used in analyzing the intentions. In addition, considering the fact of America's political campaigns and military actions, it's impossible to classify the actions on RMB into economic field simply. All of these have closed relations with American politicians and are important for their future. Therefore, liberalism, realism and theory of hegemonic stability will also be used as theoretical framework to analyze the issue more deeply, from personal, country and international points. As a result, the seeming economic issue is actually involved with political factors. As the superpower of the world, any action of America on other countries can't be analyzed simplex. Especially at the time of China's fast-development, America is more impossible to take a simple economic action on China, the real intention is related with China's rise. We can say, if China has not acquired such development, the disputes between China and America will not exist. Key words: Sino-US relations, China’s rise, economic recession, trade imbalance, unemployment rate, diverting attention, America's return to Asia, political issue