Abstract: Objective To understand the residents' individual serving and related cognition based on WeChat virtual community,provide data basis for the government and professional institutions to formulate individual serving policies or implement popular science education,so as to cultivate the healthy behavior of individual serving. Methods According to the information epidemiology,the anonymous cross-sectional survey online questionnaire was released using the official account of "Popularizing Healthy Life"（pujijiangang123） sponsored by Tianjin Centers for Disease Control and Prevention on November 17 to 24,2020,to carry out a survey on residents' cognition and related behaviors of individual serving,and analyze relevant influencing factors. Results A total of 16 048 valid questionnaires were collected in this survey. It is found that the proportion of individual serving among the residents active in the WeChat virtual community in Tianjin was 9.04%,while the epidimic of Coronavirus Disease 2019 has a positive effect on the way of eating,the proportion of "eating together before epidemic,but individual serving after epidemic" was 51.32%. Women and urban areas were the favorable factors for the individual serving,and the groups that epidemic have a greater impact on residents' eating style included men,urban areas,college/undergraduate,and business employees. Conclusion At present,the proportion of individual serving among residents is low and the awareness of individual serving is insufficient,so the public education on the individual serving should be strengthened.

Key words: Individual serving, Cognition, Health education, Virtual community