Patients with tuberculosis can be seen on a chest radiograph, which can show tuberculosis lesions. If a CT examination of the lungs is done, it will be more obvious. The scope and size of the lesions can also be diagnosed specifically. For patients with tuberculosis, the most important test is sputum examination, mostly sputum for antacid bacilli. If the sputum is positive for antacid bacilli, combined with the patient’s lung CT examination, tuberculosis can be diagnosed. For such patients, timely anti-tuberculosis treatment is required. The gold standard for TB diagnosis is still the detection of Mycobacterium tuberculosis in sputum, and the most commonly used test is sputum culture. If the sputum culture is positive, the diagnosis is clear. Because sputum culture takes longer, the most commonly used test in clinical practice is sputum smear to find Mycobacterium antacidum.