In our daily work, we often encounter similar questions from people around us, “I have already had a medical checkup, do I still need a cancer checkup?” In fact, cancer checkups are very different from health checkups. In fact, there is a big difference between cancer checkup and health checkup: the focus of the two is different, and cancer checkup is a more professional checkup. It is a professional examination method through oncology professionals to examine the whole body of the examinees through professional technical means and methods, with the aim of detecting early tumors or obtaining the high-risk factors of the examinees so as to prevent the occurrence of tumors. Due to the breadth of various disease spectrums, the scope of general health checkups does not actually cover the scope of tumor screening, and its focus is not placed on tumor screening. It is worth mentioning that oncology, as an independent branch of medicine, has its own way of examination, diagnosis and treatment, which needs professionals to complete; and as we know, it takes ten years or even longer to train an oncology professional to complete. Therefore, most general lay physicians, who do not have oncology training experience, have a superficial understanding of tumors, which may easily cause missed or misdiagnosis when encountering tumors. The purpose of cancer prevention physical examination is to prevent the occurrence of tumors, in addition to the early detection of tumors that exist inside the body. There are many factors related to the occurrence of tumor; in professional oncology medical institutions, in addition to screening, we also analyze the factors that may lead to tumor in the future, establish long-term follow-up files, and provide health education and poor lifestyle behavioral interventions to prevent the occurrence of tumor as much as possible. Another advantage of screening tumors in professional medical institutions is that in case of unfortunate diagnosis of tumors, patients can receive the fastest and most authoritative follow-up medical services. Professional medical institutions can provide a series of services for tumor patients from diagnosis to treatment to post-treatment follow-up and rehabilitation, while general medical examination institutions do not have such functions. We emphasize that tumor screening and health checkup are two different concepts. People who have had health checkup should also have tumor screening in professional medical institutions for oncology and come for it regularly every year. At present, our nationals are not aware of tumor screening, and they are not clear about their own risk of developing tumors. Since each tumor has its own risk factors, after screening, we can give a comprehensive explanation of the risk level of the tumor, so that you know what kind of screening can be done regularly for early detection and how to avoid it. For example, 95% of women in the United States are aware of the importance of annual mammograms for early detection of breast cancer. The interval of screening and the means of screening are different for different age groups, which is why we emphasize tumor screening in specialized medical institutions. In the current work of tumor prevention, what should be strongly promoted to the society is that tumor is not scary, but valuable in early detection, early diagnosis and early and correct treatment.