Action research is a type of research that has been mentioned a long time in the history of research in the world in many social sciences and humanity, education, information science... In Viet Nam, action research is rarely mentioned in the library - information scientific research works in general as well as in research on information users and information behavior of users in particular. Understanding concepts of action research as well as its nature, requirements and characteristics will enable researchers, especially librarians to apply it effectively in working and doing scientific research. The article. mentions concepts, characteristics and components of action research
the phases of action research and its application in researching the information behaviors.