Abstract: After the international financial crisis, sharing economy started in the United States and quickly spread around the world. Based on the summary of the related studies, this paper discusses the definition of sharing economy, the driving force of the development of sharing economy and puts forward three main characteristics of sharing economy. From the case study of car-hailing service, this paper sets forth both a narrow sense concept and a broad sense concept of sharing economy; after the analysis of the economic impact of sharing economy, this paper predicts its future.

Key words: sharing economy, information technology, platfor