Medical Cosmetology is a branch of medicine that takes the theory of beauty of human form as its guide and adopts surgical or non-surgical medical means to directly maintain, repair and reshape the beauty of human body. Medical aesthetics, humanistic medicine, basic medicine and clinical medicine are the roots of the emergence and development of medical cosmetology. Compared with other clinical specialties, medical aesthetics not only has more stringent requirements in terms of sterile operating room environment, comfortable and elegant peripheral environment, meticulous and delicate surgical instruments, but also puts forward strict requirements for related medical workers. Good professional ethics, excellent operation skills and the vision and mind to track the world’s medical beauty frontier. Before carrying out medical cosmetology, cosmetologists should make the following adequate preparations: 1, to large formal, good reputation of medical beauty institutions, do not believe in some unlicensed or do not have the medical beauty qualifications of small clinics, beauty salons false advertising, so as not to be deceived. 2, the right attitude to seek medical treatment, clear purpose of seeking medical treatment. The beauty of the human body and appearance both its subjective sense and objective standards, subjective and objective should be coordinated, subjective and objective contradictions should tend to objective standards. 3, to know that medical beauty has certain indications and contraindications, absolute perfect transformation does not exist, in improving the appearance and shape at the same time to bear certain surgical risks. 4., medical aesthetic before to obtain the understanding of family, relatives and friends, more communication with the doctor before surgery, as much as possible to reach a consensus on the surgical program, improve post-operative awareness, so as not to cause family conflicts. 5. Six months before surgery should be free of major diseases, no contraindicated drugs for cosmetic surgery, no serious history of mental and psychological trauma.