There are two main theoretical frameworks for discussion of the ethical problems of AI diagnostic technology: consequential theory and deontology. From the perspective of consequential theory, it is impossible for AI diagnostic technology to qualitatively surpass a doctor’s diagnosis, due to the former’s inferior intelligence. However, if AI can achieve rapid and efficient diagnoses while ensuring patient subjectivity, there is no reason why it should not replace physician diagnosis. The deontological perspective offers four options in response to strong AI. In any case, our bottom line should be to guard the subjectivity of patients and healthy people. AI may take the place of traditional diagnosis and treatment, and even of doctors, but it should not do so at the expense of the subjectivity of patients and healthy people.