This paper aims to demonstrate in respect of the growth of China as economic and military transformation, under the current Communist regime, also to critically analyze the potential to seriously threaten the future security of the United States. The paper first looks at the economic reforms that have radically changed the Chinese economy. Thereafter, the paper presents the major changes that have taken place concerning military transformation, equipment up-gradation, and power projection capability. The strategic policies of the US are also discussed. The paper then focuses on the argument that shows that China could threaten the United States. The paper concludes by noting that China is a Communist country that is dissatisfied with its status in the world and working to improve the status by becoming the most Superpower nation. Overall the paper discusses the growth of China, its transformation in military power, and also the up-gradation in the technical area of China. The paper also aims to discuss the relationship between China and United Nations. The paper also discusses whether the US is threatened by China's growth as a superpower.