Metagenome next generation sequencing (mNGS) is an important method for pathogen diagnosis of lower respiratory tract infection, but there are many difficulties in interpreting mNGS reports. The Expert Consensus on Clinical Interpretation Path of mNGS of Lower Respiratory Tract Infection, completed by Chinese Thoracic Society, provides a detailed path and guidance for report interpretation. The expert consensus covers clinical medicine, microbiology, molecular diagnosis and other aspects. On this basis, several important clinical issues need to be highlighted. First, the lower respiratory tract specimens used for mNGS must be obtained in a timely and qualified manner. Second, the correct interpretation of the mNGS report needs to be based on a full understanding of the patients and their conditions. Third, the quality of the report should be analyzed according to the main parameters in the mNGS report. Fourth, an understanding of basic microbiology knowledge is beneficial to identify valuable pathogens in the