In China, online medical consultation is regarded as part of the “Internet + medical treatment” and has gradually become an accepted way for people to seek medical advice. However, many factors can affect users’ security information behavior during the consultation process. In order to explore and evaluate the factors influencing the security information behavior of online medical consultation users, this paper firstly adopted semistructured interviews to collect data concerning the influencing factors originating from users themselves, other personnel, and the environment. Secondly, the Delphi method was used to determine the evaluation index system of the factors influencing the security information behavior of online medical consultation users based on the interview data. In this system, there are three first-level indexes, nine second-level indexes, and twenty-three third-level indexes. Finally, the weight of each evaluation index was calculated by the analytic hierarchy process (AHP) in the index system. This study improves and deepens the theoretical system of influencing factor evaluation of security information behavior. In addition, it also provides theoretical guidance and support for the more rational development of online medical consultation information services.