Data processing method and data processing device

The invention provides a data processing method and a data processing device, which can improve the data processing speed, provide faster query service for users and improve the user experience. The method comprises the following steps: acquiring first data of a first time period, wherein the first data comprises an identifier of the first time period, an identifier of a bank branch, an identifier of an asset and an asset flow amount; accumulating asset flow amounts corresponding to the same bank branch identification and/or the same asset identification in the first data to obtain a total asset flow amount, and obtaining second data including the bank branch identification and/or the asset identification and the total asset flow amount; adding a summary label and a time identifier to the second data to obtain third data; and based on the identification of the bank branch and/or the identification of the asset in the third data, the summary tag and the time identification, updating the counted data by using t