[目的/意义]探索数智环境下老年人健康信息服务的可及性能够为老年友好型社会建设提供有效的保障，探寻其影响因素及影响关系具有重要意义。[方法/过程]基于信息生态理论，从信息、信息人、信息环境、信息技术4个维度提取影响因素，运用决策实验室分析法（DEMATEL）识别出关键影响因素，并通过解释结构模型（ISM）方法确定关键影响因素的层级结构与关联路径。[结果/结论]结果表明，数据存储技术、信息协调与共享、政策法规、通信基础设施4个根源因素，需求契合性和服务稳定性2个表层因素对可及性提升有着重要影响，由此提出优化健康信息资源配置、引导适老化服务建设、完善基础设施建设的建议。

[Purpose/Significance] Exploring the accessibility of health information services for the elderly in the digital intelligence environment can provide an effective guarantee for the construction of healthy aging, and it is of great significance to explore its influencing factors and influence relationships. [Method/Process] Based on the information ecology theory, the influencing factors were extracted from 4 dimensions of information, information people, information environment and information technology, and the key influencing factors were identified by using DEMATEL method, and the hierarchical structure and association path of key influencing factors were determined by using ISM method. [Result/Conclusion] The results showed that 4 root factors of data storage technology, information coordination and sharing, policies and regulations, and communication infrastructure, as well as 2 surface factors of demand fit and service stability, have an important impact on accessibility enhancement, and thus suggested optimizing health information resource allocation, guiding age-appropriate service construction, and improving infrastructure construction.