HIV self-testing methods include blood test strips and saliva test strips. However, due to the lack of formal channels for obtaining test strips or the tendency to make errors in judgment, it is recommended to go to the hospital for a blood test. HIV test strips use antibody detection technology to detect antibodies to the human immunodeficiency virus in blood or saliva. However, during the testing process, it is necessary to choose the correct timing of the test, which can easily lead to errors in judgment. Generally, it needs to be analyzed in combination with epidemiological history, clinical symptoms and laboratory tests. Epidemiologic history includes history of intravenous drug use, history of HIV-positive occupational exposure, and so on. Symptoms such as persistent fever, diarrhea, thrush, and acromegaly should be taken seriously. Laboratory tests mainly include antibody test and viral nucleic acid test, of which antibody test is the gold standard for the diagnosis of HIV infection. Suspected AIDS patients are advised to go to regular hospitals and under the guidance of the doctor to carry out tests to clarify the diagnosis, do not blindly judge on their own, so as not to affect the condition.