Abstract This research is aimed at grasping the disease-related behavior of a patient with chronic obstructive lung disease and analyzing the relations between a disease-related behavior and clinical index, and this research was conducted to use its subsequent results as basic data for consultations with a patient and improvement in service quality. This research performed a survey for 187 patients who visited from April to May in 2010 on sequential sampling among those who visited the outpatient clinic of internal medicine for respiratory system of a university hospital located in Daegu Metropolitan City. This research used a survey questionnaire consisting of a total of 39 questions including 8 questions asking general characteristics, 16 questions asking health behavior, and 15 questions for disease management. It was found that the average period for the contraction of a disease after the research subjects got the diagnosis of chronic obstructive lung disease was 68.1±56.6 months. The patient's symptom score was 29.1 out of perfect point 40 and 72.75 points if this score is converted into a percentage. The symptom score subsequent to general characteristics showed a significant difference according to subjective economic condition. The symptom score subsequent to body mass index showed a significant difference. There appeared a significant difference in a patient's symptom score subsequent to smoking habits and it was revealed that the lower the symptom score was, the more regularly they work out. There appeared a significant difference in symptom score between the two groups due to the low symptom score of the patients who regularly visit the outpatient clinic. Also, it was found that the symptom score showed a positive correlation with smoking volume; negative correlation with sleeping hours; negative correlation with body mass index, and significant negative correlation with lung functions at that time of diagnosis and that at the time of the last follow-up. When it come to the association between general characteristics and experience in hospitalization, there appeared a lot of patients who had an experience in hospitalization in case a patient's family support was available, and as for the visiting experience in an emergency center, the longer a patient's smoking duration, the more visiting experience in an emergency center, showing a statistically significant association. There appeared a significant association between regular medications and a patient's experience in hospitalization; likewise, there appeared a significant association between whether a patient got an inoculation against flu, and experience in hospitalization. Considering the result of this research, it is thought to be necessary for a patient to get training and counseling for him or her to quit smoking and also necessary to guide a patient to get a regular medical treatment; if necessary, this researcher thinks it necessary to get a patient inoculated against flu. This research drew the result by re-arranging and analyzing data in a retrograde order, and together with this, it's necessary to analyze and interpret a patient's socio-economic characteristics and disease severity, etc. comprehensively. In addition, this researcher thinks that the major elements in management of a chronic obstructive lung disease are to instruct a patient about the necessity of managing nutrition and retaining body weight, and to continuously provide nutrition consultation and respiratory rehabilitation education.