Sugar production sugar clarification section as one of the important links of influencing the process, the important control parameter is the cane juice pH value. Based on the S3C2410 microprocessor controller pH value, pH value detection using a glass electrode, the algorithm by using the neural network method, effective solution to the traditional PID control defect. The controller has high intelligence, high stability of the characteristics, effectively solves the problem of cane juice pH value fluctuation.