Indoor microenvironment is the main place of various social activities for people. The concentration of fine particulate matter PM2.5 is closely associated with human health . The paper reviewed the evaluation of personal PM2.5 exposure in various microenvironments (residential indoor, transportation microenvironments, hospitals, schools, etc.) based on time- activity patterns, personal exposure sources to PM2.5 and uncertain factors. Also, perspectives on the research field were also presented.