(1) current situation survey-it is a comprehensive special investigation and study aimed at the current situation, characteristics and laws of the respondents. Another supplement (2) development survey-is to study the characteristics and laws of an object changing with time according to a certain purpose. It can also be divided into two forms: one is vertical development research. The purpose is to study the characteristics and laws of the respondents in different time stages. (3) Interview survey-it is a survey method to get to know someone, something, some behavior or attitude by talking as the main way. (4) Questionnaires-a research method of collecting data by asking questions in writing, that is, investigators compile survey items into forms, distribute or mail them to relevant personnel, ask for answers, and then collect, sort out, count and study them.

(5) Case investigation-refers to a comprehensive investigation and analysis of relevant educational contents by selecting only one unit and one person, that is, to understand the general situation of the whole by dissecting sparrows.

(6) Sampling survey-refers to the survey method in which a part of the target population is selected as a sample and the overall situation is inferred from the sample situation. This method can also be divided into random sampling survey and non-random sampling survey according to needs.

(7) Comprehensive investigation-refers to a form of investigation of each unit in the research object population.

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