Abstract: 【Purpose/significance】To study user participation and interaction patterns in online health communities, and to under⁃
stand the factors that influence the transformation of users from lurkers to posters, so as to provide reference for the sustainable devel⁃opment of online health communities.【Method/process】In this paper, two kinds of bounded rationality game models under incentivemechanism are constructed to calculate the replication dynamic equation and get the evolutionarily stable strategy, so as to explore the influencing factors of user participation behavior transformation. One of them is constructed between users, the other is constructed be⁃tween users and communities.【Result/conclusion】Research shows that in online health communities, the transformation of user par⁃ticipation behavior is negatively correlated with the cost of posting, the cost of privacy and the profit coefficient of reading posts, and positively correlated with the profit coefficient of posting, the amount of knowledge contributed by other users and the emotional sup⁃port. The introduction of incentive mechanism has a positive effect on the transformation of user participation behavior. In terms of
countermeasures and suggestions, online health communities can achieve the purpose of optimizing management from five aspects:platform design, atmosphere creation, user-generated content guidance, incentive mechanism introduction and privacy protection mechanism construction.【Innovation/limitation】In this study, incentive mechanism is introduced as selection strategy of online health communities, and the influence of other strategies on user participation behavior is not discussed, which can be further studied in a more comprehensive way.