In the oriental medicine field, researches have been in progress regarding oriental medical factors. I also carried out a clinical study on stroke, from which I discovered meaningful results about important factors that impact on the prognosis of stroke. We studied 132 patients after diagnosis of stroke through a Brain-CT scan and MRI sea, to the oriental internal medicine department at the Hospital affiliated to Oriental Medical College, Dongeui University. All the patients showed meaningful improvement in the examination of their symptoms after four weeks, compared with the first week. Between strokes involving meridian system and strokes involving internal organs, the symptom of paralysis caused by strokes involving meridian system, which patients were in favorable initial condition, had improved significantly and that by strokes involving internal organs had not. The group whose initial bowel movement since the stroke was delayed, whose coating on the tongue was thick or the tongue was dry, whose pulse was tachycardiac, or who had a history of hypertension or diabetics showed a significantly worse symptom after 4 weeks than that of groups in the opposite cases.