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All modern indoor swimming pools have a large volume, the water temperature control system is the serious delay and serious inertia nonlinear system. The traditional PLC control system based on PID controller can not meet the control requirements. This paper presents an integrated control system composed of a fuzzy automatic optimization algorithm and the Smith predictor compensator to adjust the temperature of pool water. Experiments and applications show that the proposed control scheme to solve the serious delay and serious inertia system can achieve good control effect.