It is in the recent 10 years that genetically modified organism appears in social sciences in China and some key concepts take shape in combination with research model of social sciences.In the process of studying genetically modified organism for more that 10 years,social sciences researchers have used different names for the same concept,which has caused some barriers and confusion between different theoretical view and study tendency.This paper,through structure analysis,defines the key concepts which are closely connected with genetically modified organism and classifies these key concepts into three types:technology——related terms,problem——related terms and practical application terms so as to form an excellent interaction between theory and practice.