Learning community can promote students' mastery of knowledge and skills, as well as the development of cognitive ability and psychology. With the advent of the information age, the research of virtual learning community has gradually become a hot spot in the field of learning community study. During covid‐19 epidemic, online teaching has been carried out in universities on a large scale. In this process, the construction of virtual learning communities provides an opportunity for learning community research. In the past research on virtual learning community, the main focus is on theoretical study. The possibility of using the network platform to establish a learning community is still being explored and there are few practical researches. Most of the researches focus on the strategy of promoting the establishment of the learning community in a certain course and network platform, but have not found common methods to organize and promote the virtual learning community. In the relevant research on online teaching under the background of covid‐19, researchers conduct research from the perspectives of teaching methods and the use of Internet technology, but less from the perspective of the learning community. This study selected four courses of different majors from three universities during the epidemic, and conduct a questionnaire survey on the institution, common goals, interactive communication, and student learning effectiveness of the class learning community and group learning community. The questionnaire survey collected 105 samples, and use SPSS software for descriptive analysis and correlation analysis. The results found that we should pay attention to the establishment of the reward mechanism and common goals, the division of labor and active and efficient interactive communication between the members when constructing virtual learning community. These methods can effectively improve learners' participation in the learning community and learning effectiveness. It is hoped to provide some references for the development of online teaching in the post‐epidemic era.