Asthma still has high morbidity and cost despite all advances in pathogenesis, diagnosis and treatment. Although asthma can be controlled with proper diagnosis and treatment, the low rates of control in our country and in the world can not be attributed to the variable course of the disease and patients' psycho-social behaviours for chronic disease. In this context, Turkish Thoracic Society (TTS) has decided to update Asthma Diagnosis and Management Guide latest published in 2000. National data were collected, compiled and prepared by authors, and final form given by the TTS Asthma and Allergy Study Group, after presenting to consultant individuals and institutions. In June 2009, the National Asthma Management and Prevention Guideline were published in Turkish. In this paper, we aimed to present the national guide in English with its basics and individual differences.