As a collaborative culture enabled by technology，open science is committed to promoting the open sharing of resources and knowledge throughout the entire research process. It accelerates scientific research and enhances public understanding of science. Open science is closely intertwined with the goals of science popularization，and offers new opportunities to transform the way that scientists engage in science popularization. Taking epistemic diversity as an analytical framework，this paper uses bibliographic coupling to map knowledge communities，combining data analysis techniques such as Python and case mining，compares the characteristics of scientists’popularization under traditional scientific research organization and in the wave of open science，and analyzes how epistemic diversity contributes to the science popularization. This study found that under a traditional scientific research organization，the main science popularization topics are climate and environment. Scientists conduct science popularization through social media，school education，and participation in policy-making. In the wave of open science，scientists leverage collaborative science research and science popularization projects，empowered by open platforms，to bring about multi-stakeholder participatory practices. The topics are expanded to multiple fields such as health，ecology，and geology. Scientists，the public，and enterprises integrate epistemic resources in collaborative science popularization，contribute their epistemic abilities，and gain epistemic benefits. This new approach can not only share the epistemic costs in scientists’popularization and promote scientific discoveries，but also promote scientists’ability and willingness.