Clinically, for finding an abnormal erection or having a weak erection, many causes are influenced by psychological factors, therefore, the diagnosis of impotence should be divided into psychological impotence and organic impotence. Clinically, most of the causes are psychological impotence, and for the diagnosis of this condition, the main test should be an erectile function test to clarify whether there are physiological abnormalities in the nerve conduction as well as vascular filling of the penis. If there are abnormalities, organic impotence should be considered. For the diagnosis of organic impotence, routine blood tests, blood biochemistry, and measurement of hormone levels in the blood should be performed to assess whether there are abnormalities. For example, low sex hormone levels can lead to organic impotence, and vascular problems of the penis, such as arteriovenous fistula, can be ruled out, and penile color Doppler and penile cavernosography can be performed to determine the occurrence of this disease. There are also systemic diseases that should be ruled out, such as diabetic peripheral neuropathy, cardiovascular system diseases, and hypertension that can cause organic impotence.