There are many limitations in the current treatments of Inflammatory bowel disease(IBD). Some patients have no or little reaction to the traditional drugs. Now the investigators realized that the intestinal microbiota is closely associated with the development of IBD. In recent years, a retrospective study showed that the overall efficiency of fecal microbiota transplantation (FMT) for IBD was 79%, the overall remission rate was 43%, which opened a new chapter in the treatment of IBD. So the standardized fecal microbiota transplantation is considered to be simple but effective emerging therapies for the treatment of IBD. In this project the investigators intend to carry out a single-center, randomized, single-blind clinical intervention study. The investigators plan to recruit patients with IBD (Ulcerative Colitis and Crohn's Disease) in China. The patients will be randomly divided into two groups, one group will be given treatment of standardized fecal microbiota transplantation, the other will be simply treated with traditional drugs, followed up for at least 1 year. The investigators aim to determine the efficiency, durability and safety of Fecal Microbiota Transplantation for IBD treatment, and further to explore which major microbiota may effect in this project.