In the paper,a method of storing the operating parameters of a microprocessor system is introduced,and stores the parameters in many types of microprocessor systems.With the help of the existing data storage chip of the system,the hardware saves the cost of the device,and the software reuses the read and write code of the storage chip to save the amount of code,which can quickly find the current parameters in use and the historical backup parameters.According to the use effect on several microprocessor systems,it has the characteristics of stable storage of operating parameters and reliable parameter loading when starting up,and there is no case of system crash due to failure of reading operating parameters.