This paper addresses a system scheme of DC Electronic Load. The MCU used in this system, STM32F103VCT6, is used as core to develop a DC Electronic Load with the technique of, for example, multichannel ADC sampling technique which is used to monitoring the voltage and the branch current in real time. Finally, the DC Electronic Load accompanied with function of constant current, constant voltage, constant power, constant resistance. This paper designs a DC Electronic Load with the maximum current 30A, withstand voltage 90V, maximum power 150W. This paper presents a process of improving the stability of the DC Electronic Load.