Recently, exosome has gained great attention in the field of biomedical research, especially in precision medicine-related diagnostic technology and clinical transformation of therapeutic strategies. There have been a large number of exosome-related studies involving non-invasive diagnosis of diseases, liquid biopsy of tumor, development of precision drugs and observation of clinical efficacy. Exosomes possess four biological characteristics:stable, trackable, active and real-time, which make them the key factors for the next generation"STAR"of translational medicine. Since 2014 exosome-related studies began to show an explosive increase, and several exosome-associated patent technologies or products have appeared. This article summarizes the research history, biological characteristics and clinical exploration of exosomes, and analyzes the prospects of exosome-related technology.