A 33 year-old male who had been diagnosed with severe ulcerative and ankylosing spondylitis was treated and observed. Even though he had been treated with western medicine, he still complained of severe diarrhia, hemafecia, abdominal pain, general weakness, mild fever($37.8^{circ}C$) and lower back pain. On radiologic examination, the lumbar view revealed the sacroliac joint space are irregular with adjacent bony sclerosis on both sides. He was treated with Chengsim Yeunja-Tang. Having been treated for 99 days, severity of ulcerative colitis changed from severe to mild ade, lower back pain reduced from nine to three, and all other symptoms improved.