Objective To provide evidence-based therapeutic schedule for an adult patient with Lumber Isthmic Spondylolisthesis grading II. Methods Based on fully assessing the patient’s conditions, the clinical problems were put forward according to PICO principles. Such database as The Cochrane Library (2005 to April 2011), DARE (April 2011), CENTRAL (April 2011), MEDLINE (April 2011), EMbase and CBM were searched to collect high quality clinical evidence, and then we told a patient information about treatment plans. The plan was chosen by the patient for she knew her conditions and the plans. Results We included 1 meta-analysis, 3 randomized controlled trials, 5 systematic reviews and 1 prospective study on the natural course of isthmic spondylolisthesis were included. Literature evidence indicated that the prognosis of isthmic spondylolisthesis was good. Surgery should be selected when there was neither no remission of symptom, nor progression of lumber olisthy with conservative treatment. The long-term effect of surgery may be good, but it cannot change the natural course of the disease. Based on literature evidence, the patient chose the conservative treatment. After one year’s treatment the patient recovered, her sciatica relieved, and CT showed no progression of lumber olisthy. Conclusion Patient with low grand isthmic spondylolisthesis chose conservative treatment may achieves good effects, whereas on the process of the treatment, regular follow-up to monitor the progression of lumber olisthy should be conducted.