Aiming at the problem that certain conditions are needed when transplants μC/OS-Ⅲ on STM32F103RC, this paper introduces a method of transplanting C/OS- III. This paper introduces the method for transplanting μC/OS-Ⅲ. The paper introduces convenience which bring by Cortex-M3 kernel and three aspects of content about μC/OS-Ⅲ transplantation, focuses on introducing the details of file edition and revision of the μC/OS-Ⅲ transplantation, and described the successful transplantation of μC/OS-Ⅲ on STM32F103RC. The results show that this method has the maneuverability, and it can achieve the transplantation of μC/OS-Ⅲ on STM32F103RC