After leading the world’s first two waves of the information & communication technology industry，the United States is still the world leader of the third wave：Internet of Things （IOT）. IOT was coined by USA. USA has a strong foundation for the development of IOT，not only due to the fact that USA masters all three key techniques，but also due to the fact that its industry chain of IOT is complete. USA has paid enough attention to IOT although IOT is not a strategic concern for the Obama Administration. USA also dominates the international standardization of Internet of Things. USA has made great achievements in IOT，including two large-scale IOT platforms and a lot of consumer products for IOT. This paper presents the state of the art and practice of IOT in USA from three aspects：platforms，consumer products and specific trends.