1. A calibration method of an image capture system, wherein the image capture system comprises at least one image capture device and a calibration unit, a device applied to the calibration method comprises an operation unit, a test pattern comprises a plurality of geometric blocks, and each geometric block of the plurality of geometric blocks has at least two sides, the calibration method comprising: an image capture device of the at least one image capture device capturing an image comprising a plurality of intersection coordinates among the plurality of geometric blocks of the test pattern and a color information of the each geometric block of the plurality of geometric blocks of the test pattern; the operation unit executing a first operation on a plurality of intersection coordinates comprised in the image to generate a plurality of geometric calibration parameters; the operation unit executing a second operation on a color information of each geometric block of a plurality of geometric blocks comprised in the image to generate a plurality of color calibration parameters; and the calibration unit calibrating the image capture device according to the plurality of geometric calibration parameters and the plurality of color calibration parameters.