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, each test pattern of a plurality of test patterns 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 each test pattern and a color information of the each geometric block of the plurality of geometric blocks; the operation unit executing a first operation on a plurality of intersection coordinates among a plurality of geometric blocks comprised in each image of a plurality of images corresponding to the plurality of test patterns 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 each image of the plurality of images corresponding to the plurality of test patterns, or on a color information of each geometric block of a plurality of geometric blocks comprised in an image of the plurality of images corresponding to the plurality of test patterns 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.