Abstract: Taking the measured temperature processing technology for the plate controlled cooling system as the research object, a measured temperature filtering method with fault tolerance was established and the effect of measuring error and tracking error was eliminated. On the basis of least square method, the curve for the measured temperature was fitted as the criterion for the plate length cooling uniformity and this method was used in cooling schedule setting and self-learned calculation model. The plate longitudinal sample controlled method based on the measured temperature was established. The temperature of every longitudinal sample was acquired by linear interpolation method to realize the high precision control of finish cooling temperature and cooling rate by the controlled cooling system.