Coughing sputum usually suggests the presence of inflammation of the respiratory tract, such as bronchitis and pneumonia. In this case, if the sputum is yellowish green, as an empirical option, Pseudomonas aeruginosa infection and septicemia are considered, ceftazidime, penicillin, and quinolones, such as ciprofloxacin, can be chosen for treatment. After the use of these drugs, pathogen culture of yellow-green pus sputum and drug sensitivity test can be checked when necessary, and according to the results of the test, sensitive antibiotics can be selected and the treatment plan can be adjusted, and the patient can be reviewed at any time.