The incidence of prostate cancer in Europe and the United States is extremely high, while the incidence in Asians is low. However, the increasing incidence in China in recent years should be taken seriously. Patients with prostate cancer are mainly older men. Genetics is an important risk factor for the development of prostate cancer into the clinical type, and exogenous factors may have an important influence on this risk factor, such as lifestyle changes, sun exposure, long-term exposure to chemicals such as cadmium, diet high in calories animal fat and vitamins A and D, and alcohol abuse. Early prostate cancer is usually asymptomatic, but when the tumor invades or obstructs the urethra or bladder neck, symptoms similar to lower urinary tract obstruction or irritation may occur, and in severe cases, acute urinary retention, hematuria, and urinary incontinence may occur. Prostate cancer usually develops slowly. Rectal finger examination combined with serum prostate-specific antigen (PSA) test is currently recognized as the best primary screening method for early detection of prostate cancer. In addition ultrasound finding hypoechoic nodules in the prostate or MRI finding abnormal signals also need to suspect prostate cancer. When prostate cancer is suspected, prostate puncture should be performed immediately to clarify the diagnosis of prostate cancer through pathological results. The distant metastasis site of prostate cancer is mostly bone metastasis or lung metastasis. Most prostate cancers are hormone-dependent and their development is closely related to the regulation of androgens, while non-hormone-dependent prostate cancers are only a minority. For early stage prostate cancer, radical prostatectomy can be considered. For advanced prostate cancer, endocrine therapy should be the main treatment. In general, the treatment effect of prostate cancer is still satisfactory. In particular, endocrine therapy can treat not only the primary site, but also metastases (such as bone or lung metastases). The occurrence of prostate cancer is always somewhat intimidating, and people are always interested in learning about methods or strategies to prevent the disease. There are some studies that show that reducing the intake of animal fats, increasing the intake of fiber-rich foods such as fruits, grains, and vegetables, increasing the intake of legumes and vitamin E, green tea and red wine, and even estrogen intake may have a preventive effect and reduce the risk of the disease. In men over 50 years old, the incidence rate increases with age. Therefore, medical checkups for men in this age group should be strengthened through anal finger examination, PSA and prostate ultrasound to achieve early detection, early diagnosis and early treatment.