When public health emergencies occur, relevant information containing different topics, sentiments, and emotions spread rapidly on social media. From the cognitive and emotional dimensions, this paper explores the relationship between information attributes and information dissemination behavior. At the same time, the moderating role of the media factor (user influence) and the time factor (life cycle) in information attributes and information transmission is also discussed. The results confirm differences in the spread of posts under different topic types, sentiment types, and emotion types on social media. At the same time, the study also found that posts published by users with a high number of followers and users of a media type are more likely to spread on social media. In addition, the study also found that posts with different information attributes are easier to spread on social media during the outbreak and recurrence periods. The driving effect of life cycles is more obvious, especially for topics of prayer and fact, negative sentiment, emotions of fear, and anger. Relevant findings have specific contributions to the information governance of public opinion, the development of social media theory, and the maintenance of network order, which can further weaken the negative impact of information epidemic in the occurrence of public health emergencies, maintain normal social order, and thus create favorable conditions for the further promotion of global recovery.

当突发公共卫生事件发生时，包含不同主题、情绪和情绪的相关信息在社交媒体上迅速传播。本文从认知和情感两个维度探讨信息属性与信息传播行为的关系。同时，还讨论了媒体因素（用户影响力）和时间因素（生命周期）在信息属性和信息传递中的调节作用。结果证实了不同主题类型、情感类型和情感类型下的帖子在社交媒体上的传播差异。同时，研究还发现，拥有大量关注者和某一媒体类型的用户发布的帖子更有可能在社交媒体上传播。此外，研究还发现，在疫情和复发期间，具有不同信息属性的帖子更容易在社交媒体上传播。生命周期的驱动作用更加明显，尤其是对于祈祷和事实、负面情绪、恐惧情绪和愤怒情绪等话题。相关研究成果对舆论信息治理、社交媒体理论发展、网络秩序维护等方面有具体贡献，可进一步削弱信息流行对突发公共卫生事件发生的负面影响，维护正常社会秩序，从而为进一步推动全球复苏创造有利条件。尤其是关于祈祷和事实、负面情绪、恐惧情绪和愤怒的话题。相关研究成果对舆论信息治理、社交媒体理论发展、网络秩序维护等方面有具体贡献，可进一步削弱信息流行对突发公共卫生事件发生的负面影响，维护正常社会秩序，从而为进一步推动全球复苏创造有利条件。尤其是关于祈祷和事实、负面情绪、恐惧情绪和愤怒的话题。相关研究成果对舆论信息治理、社交媒体理论发展、网络秩序维护等方面有具体贡献，可进一步削弱信息流行对突发公共卫生事件发生的负面影响，维护正常社会秩序，从而为进一步推动全球复苏创造有利条件。