Sputum smear is used as a test to diagnose tuberculosis disease, and it can also be used to determine the effectiveness of treatment after a patient with tuberculosis has been treated. If the sputum smear is positive, it means that the patient may have tuberculosis, and tuberculosis disease is still a serious danger. If the disease is diagnosed, proper treatment must be given in a timely manner. However, a positive test does not necessarily mean that the patient has tuberculosis. If the test is negative, tuberculosis cannot be completely ruled out, and multiple sputum smears with symptoms and medical history are needed to assist in the diagnosis. If tuberculosis is diagnosed, it is important to pay attention to more ventilation in the room and actively cooperate with the doctor for treatment.