 COPD, with high prevalence, morbidity, mortality and economic burdens, affects millions worldwide. Although many therapies exist and are being developed to relieve symptoms and reduce mortality in COPD, most have only been studied in placebo-controlled efficacy studies in highly selected populations. There are few clinical trials to compare therapeutic alternatives in real world. Furthermore, some randomized controlled trials on comprehensive TCM interventions, especially based on the TCM patterns, have been the certain evidence for showing definite effect for COPD patients. In addition, studies in real world populations of COPD that received different therapies that do have efficacy evidence was found wide variations in care delivery. In short, there is a need for cohort study in COPD. 