In order to solve the impact of program status information feedback on the quality of voice communication,monitor the running status of embedded real-time operating systems in real time,and master the execution of each program in the program development process,a voice program status monitoring system based on FreeRTOS CLI is designed.The system is based on FreeRTOS real-time operating system,with STM32F407 as the core and WM8978 as the voice processor.Through this system,the PC side can monitor the operation status of the entire voice communication system through the USB virtual serial port,which is helpful for program debugging in the entire software development process,and after the program development is completed,the user can use the system to monitor the device microphone,amplifier to adjust the volume and sound quality.