The establishment of aquaculture welfare in circulating water system,based on fishery welfare concept and the characteristics of closed circulating water system of aquaculture,has become a strategic need to promote the sustainable development of modern fishery in China.In this paper,the impact factors of welfare in circulating water system,intensive demands and scientific evaluation standards of aquaculture welfare in circulating water system were analyzed and discussed.The contents of this paper refer to the key technology in circulating water system,cross merging advanced information technology and automatic control technology.The purpose of this paper is to provide theoretical and technical support to set up the criterion of production process control,establish security mechanism in aquaculture welfare,and truly improve quality and safety level of aquacultural product in the future.