First of all, you should know that there is no such profession as "anesthesiologist"! It is "anesthesiologists" who are engaged in anesthesia, not technicians. Anesthesiologists are basically clinicians, because anesthesiology is a branch of clinical medicine, which is the same as the imaging department of internal medicine, surgery and pathology.

In other words, all the people engaged in anesthesia are clinicians, and they need to be qualified for clinical practice. Anesthesiologists, like doctors in other departments, need to receive formal undergraduate or specialist clinical medicine or clinical anesthesia education, obtain the qualification of practicing physician or practicing assistant physician after graduation, and register as anesthesiologists in the hospital before they can carry out clinical anesthesia work.

Therefore, if you want to become an anesthesiologist, you must first get a major in clinical medicine or anesthesiology in a medical college, and then get a corresponding degree after graduation, and then take the exam as a practicing doctor or assistant (the latter can only work in a medical unit below the county level). This is no different from being a doctor in other professions.