A drinking water filtration system with intelligent and security management functions was designed in this paper. The STC89C58RD+ was applied as the MCU and the intelligent IC card as security center by using AES encryption algorithm. The real-time and flow signals derived from the RTC chip DS1302 and the SABOCN turbine flow sensor helped to accomplish the closed loop control system. At the same time, the intelligent management system was designed in Visual C++6.0 circumstance. Experiment and production application results show high control precision and satisfied management performance.