Because of the different nature, purpose or object of the research question, interview methods have different forms. According to the standardization of interview process, interview methods can be divided into structured interview and unstructured interview. The former is characterized by directional standard procedures, usually using questionnaires or questionnaires; The latter refers to free conversation without directional standardization procedures. According to the interviewer's leading degree, it can be divided into guided interview and non-guided interview. According to the number of interviews, it can be divided into individual interviews and group interviews. According to the functional direction of the interview content, it can be divided into export-oriented interviews (that is, eliciting information or opinions from the interviewee), injection-oriented interviews (that is, the interviewer informs the interviewee of the information and opinions) and discussion-oriented interviews with equal emphasis on export and injection. When the content discussed in the discussion interview is centered on the interviewee, it is called customer-oriented interview; When the problem event is the center, it is called question interview. As a psychological research method, interview can also be divided into interview detection method and interview investigation method. Interview detection refers to interviewing and observing the interviewees in the process of psychological research, and testing the psychological problems observed in experiments, tests and diagnoses.