Chapter 1. The history of chito/chitin oligosaccharide and its monomer.- Chapter 2. Current studies of chito/chitin oligosaccharide and its monomer.- Chapter 3. Preparation of chito oligosaccharide and its monomer.- Chapter 4. Preparation of chitin oligosaccharide and its monomer.- Chapter 5. Detection and separation of chito/chitin oligosaccharides.- Chapter 6. Cleaner production guide of chito/chitin oligosaccharide and its monomer.- Chapter 7. Modification of chitin/chitosan and its oligosaccharide.- Chapter 8.Biological activities and potential application in food industry.- Chapter 9.The application ofchitooligosaccharides onbiomaterials.- Chapter 10.The Application of chito/chitin oligosaccharides as Plant Vaccines.- Chapter 11.The application ofoligosaccharides in breeding industry.-