PURPOSE: A method for diagnosing So-eum using white ginseng or Angelica gigas nakai is provided to diagnose four types of Sasang constitutional medicine based on physiochemical data and to affect whole food industry. CONSTITUTION: A method for diagnosing So-eum among four types of Sasang constitutional medicine comprises the steps of: collecting blood of a subject person and isolating lymphocytes; preparing a white ginseng extract; adding the isolated lymphocytes to the extract; and culturing the lymphocytes and measuring cell proliferation. The absorbance is 0.33-0.35 when the cell proliferation is measured at a wavelength of 570 nm. [Reference numerals] (1) Cell proliferation ability; (AA) Collect blood from a test person; (BB) Administration; (CC) Prepare a white ginseng extract; (DD) Culture; (EE) Diagnose So-eum among four types of Sasang constitutional medicine