The proportion of China's aging population is high, and the health care system has become a hot topic. This study considers the private doctor service-assisted health care market and investigates doctors, middle-aged and young people, and the elderly, respectively. Through correlation analysis, the relationship between respondents' willingness to accept private doctors and various factors was obtained. Then the logistic regression model was used to obtain the linear relationship between these related variables and the sign-up intention (willingness to participate) of different groups.