Recently, there have been many studies of health services combined with smart devices, gathering a user' health lifelog and managing his or her health for the improvement of the quality of his or her life, using various sensors. However, previous works have problems in the extraction of patterns in person's complex health lifelog, the analysis of complex relations among those patterns, the extension of them to related services, and reuse of lifelog patterns. The healthcare lifelogs should search efficiently data necessary for users from big data because those gather real-time data of various types of data. The healthcare lifelogs should search efficiently data necessary for users from big data because those gather real-time data of various types of data. In this paper, we propose the intelligent healthcare service for reasoning personal health state with data extraction, pattern analysis, health life ontology modeling using health lifelog analysis based on smart devices. The proposed health information service provided more and more appropriate service with users if more reasoning rules related to more and various healthcare lifelog information gathering are included in the service.
Keywords: Inference rules; Intelligent healthcare service; Lifelog analysis; Ontology modeling.