Abstract: With rapid development of aquaculture industry, improving aquaculture efficiency and ensuring aquatic products quality has become an urgent problem to be solved in industry．As one of effective tools to solve such problems, intelligent fish and shrimp feeding system has attracted widespread attention with its automation and precision features．Intelligent fish and shrimp feeding system based on programmable logic controller（PLC）technology, integrated with water quality monitoring and control functions, could adjust feeding strategies according to growth needs and water quality conditions of fish and shrimp, thereby improving growth efficiency of fish and shrimp and reduce mortality rate．The system monitored multiple water quality parameters in real-time, including water temperature, dissolved oxygen, and pH value through sensors, and used PLC actuators to precisely control feeding machinery．A new design idea for intelligent fish and shrimp feeding systems was provided, and scientific and effective technical support for precision aquaculture was also provided．