The human intestinal microbiota is composed of complex community of 10\*13 to 10\*14 commensal microorganisms\[1\]. Human intestine provides a nutrient-rich habitat for intestinal microorganism which allows a diverse ecosystem to enhance their host's immune system and facilitate digestive activities. Numerous researches are investigating the role of gut microbiota in human homeostasis, which may be related to the pathogenesis of gastrointestinal disease and autoimmune disorder. Fecal microbiota transplantation (FMT) is defined as infusion of feces from healthy donors to affected subjects. FMT works by altering the patient's microbiome and it is now recommended as an effective therapy for Clostridium difficile infection (CDI) not responding to standard therapies\[8\]. It has attracted great interest in recent years and many researches are exploring the FMT's potential role for treating other gastrointestinal disease such as IBD. A FMT registry is required to explore the relationship between disease prognosis and intestinal microbiota.