questionnaire survey is a survey method in which investigators ask and record some aspects of social life and their views, attitudes and conditions about certain social phenomena or behaviors through questionnaires.

The investigators used pre-designed standardized questionnaires to collect information and conduct research and analysis on the respondents. The advantages of questionnaire survey method are high efficiency, large sample survey can be carried out in a short time, and a large number of rich and detailed data can be collected, which is easy to quantify and analyze, and the personal factors of investigators have little influence on the survey quality.

its disadvantages are high cost, long research time, obvious lack of research depth, and low research validity and reliability in explaining the causes of the phenomenon.