Obesity is associated with high mortality. Bariatric surgery is considered the only evidence-based approach to sustainable weight loss. The most popular bariatric surgeries are Roux-en-Y gastric bypass, gastric banding and sleeve gastrectomy. The laparoscopic approach is favored over the open method for its good recovery. Recently, the robotic system was applied to bariatric surgery, and was reported to have strengths during suturing and anastomosis. On the other hand, there is no report of robotic bariatric surgery in Korea. In the present study, robotic Roux-en Y gastric bypass and robotic sleeve gastrectomy was performed successfully on morbidly obese patients.