The application provides a Dynamic Voltage Frequency Scaling device. The Dynamic Voltage Frequency Scaling device in a convolutional operation device acquires working state information of the convolutional operation device and its internal units/modules in real time and scales working voltage or working frequency of the convolutional operation device and its internal units/modules according to the working state information of the convolutional operation device and its internal units/modules, so as to reduce the overall running power consumption of the convolutional operation device during the convolutional operation.