The voltage adjustment of the Loongson processor will affect the normal operation of CPU load. It causes the processors to fail to run under high voltage and then affects the stable high-frequency operation. Accordingly, the turbo boost method based on the system management controller (SMC) is proposed, which makes full use of the SMC to monitor and adjust the voltage and frequency of processor cores in real time. At the same time, for the real-time operation of SMC as well as the fast communication between SMC and the processor cores, the real-time operating system RT-Thread is equipped and the inter-processor communication protocol “Service Request” is designed. Through dynamic frequency and voltage regulation modules as well as the automatic temperature control module, the unified management of the frequency, voltage, and temperature of processor cores is realized. The experimental data on the Loongson 3A4000 platform shows that this method is effective and reliable. Moreover, when the overall power consumption of processors is increased by 25.5%, the overall performance can be improved by 34.2%.