Data processing methods, data processing apparatuses, and storage media are provided. The method is applicable to a data processing system. The data processing system includes a storage device and a programmable device. Data is transmitted between the storage device and the programmable device via a bus. A controller and an accelerator are deployed on the programmable device. The controller is enabled with at least two kinds of data format conversion function. The method includes: the controller obtaining the first data; the controller performing data format conversion on the first data to obtain second target data in a target data format; and the controller storing the second data to the storage device and/or sending the second data to the accelerator.