Sputum culture is an examination method used to clarify the type of pathogenic bacteria. It is more helpful for clinical treatment of bacterial infectious diseases. By collecting sputum from patients in a targeted manner, such as mucous sputum, purulent sputum, bloody sputum, etc., and keeping it as a specimen, the specimen is planted in the culture medium, and after a period of culture, the growth of bacteria can be viewed, and the type of pathogenic bacteria can be clarified by identifying the bacteria that have grown, and the sensitive antimicrobial agent can be selected for the culture results to achieve the best treatment effect.