Type: According to the depth of research, it can be divided into descriptive topics, causal topics and predictive topics; According to the size of the subject, it can be divided into macro subject, meso subject and micro subject; According to the research level, it can be divided into general topics, major topics and key topics;

According to the research purpose, it can be divided into theoretical topics and applied topics. The former aims to reveal the essence of social phenomena and its development law; The latter aims to put forward specific plans or countermeasures to solve social practice problems.

Selection criteria: importance. Refers to the selection of topics that are important in the field of this discipline and have a far-reaching impact on the development of this discipline; Time magazine. It means that the topic selection should proceed from the needs of the current social situation and reflect the spirit of the times. Interesting; That is, from the author's hobby.

Interest is the author's devotion and concentration to a problem, which urges researchers to think deeply, explore and ask questions. However, many scholars have made breakthroughs in academic issues with keen interest. Objective: Scientific research is a purposeful work, and the research objectives should be defined first when selecting topics.

Scientific researchers should set a stable research direction for themselves, and consider the prospect and feasibility of subject development, the possible conditions of the unit and personal interests when positioning. Scientificality: we should consider whether the topic has scientific value, whether the demonstration materials can stand the test of practice, and whether the way of collecting and sorting materials is scientific and reasonable.