The implementation of the innovation-driven development strategy is based on the county，its vitality lies in the county，and the difficulties are also in the county. As the wing of boosting innovation-driven development，science popularization in county plays an important role in boosting economic development and grassroots governance. This paper adopts the research tools and methods such as literature research，questionnaire research，interview research and web crawler research to systematically investigate the development status of science popularization in county from the three dimensions of organization，investment and operation. On this basis，this paper summarizes the achievements of science popularization in county，and analyzes the main problems existing in the development of science popularization in county，as well as the current structural contradictions and conflicts of science popularization in county. At the same time，through the study of typical cases，the successful experience of science popularization in county is summarized，and the needs of county science popularization development are identified from three levels of supply system，support system and demand system. Through grounded theory and ISM model，the main factors that restrict the effect of science popularization in county are deeply excavated，and the countermeasures and suggestions for the innovative development of science popularization in country are discussed from the perspective of development.