The technique of bronchoscopy-biopsy (BO) and fine needle aspiration cytology (FNAC) is two coventional technics to apply diagnose the lung cancer in the oncological centre of Hai Phong Viet-Tiep hospital. Since January 2010 to December 2011, there are 80 cases of lung cancer, who have been diagnosed by 2 technics of BO and FNAC and its' results: - Many patiens have been hospitalized very late: 62,2 percent. - The of BO on 44 patients - invasive lesion 63,6 percent, stenose lesion 50 percent. - The pathology of BO and FNAC: squamous cell - 48,8 percent, adenocarcinoma - 37,5 percent and other rarely type. - The stage of lung cancer: stage IV 37,5 percent, stage II - 27,5 percent, stage III - 22,5 percent and stage I - 12,6 percent. The BO and FNAC is classical technics but they still aren't easy to apply diagnose the lung cancer in many hospitals. The results of the Internal Department 2 and Hai Phong Oncological Centre, which the authors have making and compare with other results in the world are respectable.