Underwater safety is concerned with the core national security and interests. Firstly，the paper describes the concepts of sea battlefield situation. According to the increasingly complex security threats that our underwater forces face，the necessity of underwater operational system is analyzed. Then，the conventional method of underwater operational system design is researched and the corresponding system construction scheme is given on the basis of operational requirements analysis. By analyzing the real-time and dynamic characteristics of underwater battlefield situation and its important influence on command and decision-making，the limitations of the conventional method are discussed. Referring to the concept of time-varying dynamic generation of sea battlefield situation，a simulation experiment is designed to improve and optimize the conventional method，and a design and optimization method of underwater operational system based on time-varying dynamic generation of sea battlefield situation is given.
