In the process of heat sterilization， there are problems in measuring the cold spot temperature and the sterilization intensity of the food， and the problem that the actual temperature of the sterilization retort deviates from the control temperature due to the instability of the heat source. This paper developed a device that could display the sterilization intensity of food centers in real time and thus intelligently corrected the control temperature. The device mainly included real-time F value calculation part and correction part， which was suitable for different types of sterilization retorts， and supportive PC software was developed. The experiment showed that the deviation of the food center temperature and the value calculated by the device according to the temperature of the sterilization retort was about 3.12%， and the deviation could be corrected according to the set sterilization value. The deviation between the sterilization value and the set value was 5.5%， which could meet the engineering application.