A data processing system and method is proposed. The data processing system is connected with a component library and an original design database. The component library includes component data including part numbers and attributes of components while the original design database stores original design data of pins, nets and codes containing part numbers of components on a circuit diagram. A setting module allows users to set instructions of the original design data to be extracted, and then a data extracting module extracts data of pins, nets and codes of components from the original design database based on these instructions, so that a data processing module may analyze and associate the data extracted by the data extracting module with the component data in the component library and integrates the associated data to create an integrated data required by the user.