Klebsiella pneumoniae is a bacterium, not a lung cancer. It is a common causative agent of pneumonia and belongs to Gram-negative bacilli. Pneumonia caused by Klebsiella pneumoniae usually results in a brick-red jelly-like sputum with characteristic imaging of the lungs and a prolapse of the interlobular fissures. The specific imaging and sputum characteristics, combined with the culture of the patient’s sputum, can be used to identify Klebsiella pneumoniae infection. In general, Klebsiella pneumoniae infection is seen in elderly patients with underlying lung disease, including chronic obstructive pulmonary disease, who are prone to a combination of Klebsiella pneumoniae infection. Klebsiella pneumoniae infection is prone to produce ultra broad-spectrum β-lactamase, and after producing ultra broad-spectrum β-lactamase, it will become resistant to β-lactam antibiotics, and appropriate antibiotics should be selected according to the drug sensitivity, and after precise antibiotic treatment, the prognosis of Klebsiella pneumoniae pneumonia is generally good.