Based on the current condition of marine fishery resources in the world,this paper indicates that warning system is of one the important methods in realizing the sustainable use of marine fishery resources.The paper also introduces the concept,structure,content and characteristics of early warning system in the sustainable use of marine fishery resources.The paper analyzes the concept and content of both warning means and warning indicator in the early warning system,and the running mechanism of early warning system as well.In the end,the paper initially builds the system structure of warning indicators in the sustainable use of marine fishery resources.