This study is a cross-sectional survey in 20 hospitals in Northern China. We designed two separate series of questions to be answered by patients and cancer management professionals. In the patient questionaire, we collect information on the prevalence, location, intensity, impact on life of lung cancer related pain. Questions on how doctors evaluate and manage the pain are included in both the patients' and physicians' surveys. In the doctors' questionaire, we also assess current situation of cancer pain educational programs attended in medical schools and post graduation through related questions.