The invention provides a data processing method and device, and relates to the technical field of power data processing. The data processing method is applied to the data processing device, and the data processing device is connected with a data application device. The method comprises that received power data is analyzed to obtain analysis data; whether the analysis data satisfies a preset condition is determined; and if YES, the analysis data is stored in a memory of data collector, and sent to the data application device. Thus, the method can be used to solve the problem that present data application device is low in working efficiency.