The invention relates to an accurate load control system, and belongs to the technical field of large power grid system protection safety and stability control. According to the accurate load controlsystem, a UDP/IP communication protocol is adopted, so that the reliability of communication interaction between a substation device and a terminal device is guaranteed, a 55 normal frame message period sending mechanism is adopted, and a reasonable sending period is set, so that the real-time requirement of an actual system on data interaction can be met, and the pressure of a wireless transmission bandwidth can be reduced, and a 99 command frame message abrupt change continuous sending mechanism is adopted to send load switching command protection, so that the rapidity of an action command can be effectively ensured, the whole set of action time can be reduced, interruptible loads can be quickly cut off, and the safe and stable operation of a power system can be ensured.