A method for assisting in data calculation by using a display card: In the present method, input data stored in a system memory is transformed into texture data, which is then stored in a display memory of the display card. Then, a Graphic processing unit (GPU) of the display card is used for executing a texture calculation to the texture data, and a result of the texture calculation is stored in a display target of the display memory. Finally, the display target is outputted to the system memory as the output data. Accordingly, a part of calculation tasks of a central processing unit (CPU) can be given to the GPU of the display card when the CPU is in a high usage rate, so as to reduce a calculation burden of the CPU.