A servo pressure control system comprises a servo pressure controller, a pressure sensor, and a servo motor. The servo pressure controller includes an MCU, an ADC circuit, a DAC circuit, an analog input signal zeroing circuit, and an analog signal PID adjustment circuit. The pressure sensor sends a voltage signal reflecting the pressure value to the servo pressure controller and sends a voltage signal reflecting the user command to the servo pressure controller, the voltage signal reflecting the pressure value passes through the analog signal zeroing circuit and is then sent to the ADC circuit, the analog signal PID adjustment circuit carries out proportional, integral, differential treatment on the deviation between the two voltage signals reflecting the pressure and target pressure, and the obtained voltage signals are sent to the ADC circuit and a servo motor system. The servo pressure controller further includes an analog signal limiting output circuit used for limiting the transmitted voltage signals within a certain range. The problem concerning pressure control is solved in the automation industry, and the real-time response and control precision are improved greatly.