Overactive bladder is a very common old-age lower urinary tract disease. The main pathophysiology is involuntary detrusor muscle contracture during bladder filling phase. Frequency, urgency, and with or without urge incontinence are main clinical manifestations. Overactive bladder treatment anti-acetylcholinergic agents are the mainstay of therapy. The side effects of dry mouth and constipation often influenced its clinical application. In this study, we used traditional Chinese formulas (Bu-Zhong-Yi-Qi-Tang, Sang-Piao-Xiao-San) to treat patients with overactive bladder for four weeks, and compare its efficacy according documented international assessment standard of urinary symptoms severity in 1997-2001 and patients voiding diary record. Results demonstrated that the formulas treated overactive bladder significantly improved the frequency of voiding, urgency and urge incontinence as well as increased the voiding volume and quality of life. Besides, the formulas is seldom side effect except dry of mouth, and it’s security and patients toleration are well.