The standard treatment of pancreatic necrosis has been surgical necrosectomy. There has been debate on whether early surgical intervention can reduced by infected pancreatic necrosis (IPN). Early emergency laparotomy and multiple organ failure remain associated with high mortality. However, reports have presented during the last 10 years of survival of severe acute pancreatitis with medical management. Large and multicenter study showed that about two thirds of patients with necrotizing pancreatitis can be treated conservatively with relatively low mortality. Patients with IPN benefit from postponding intervention and minimal invasive treatment. We reviewed 4 literatures including 2 Korean institute reseached reports concerning non-surgical, conservative treatments of necrotizing pancreatitis including IPN. Large and multicenter study showed that about two thirds of patients with necrotizing pancreatitis can be treated conservatively with relatively low mortality.