At present, there are two digital color proofing methods, one is halftone proofing, and the other is continuous tone proofing. These two kinds of proofing have many technologies, such as laser dye removal technology, color inkjet replication technology, dye thermal sublimation technology, laser color printing technology, thermal transfer replication technology and so on. Each digital proofing technology has its advantages and disadvantages, and the prices of equipment and consumables may vary greatly. But as long as the management and calibration are correct, each digital proofing technology can produce very accurate colors. When discussing digital proofing technology, we should not only consider the advantages and disadvantages of various color proofing technologies, but also judge each proofing technology from an economic point of view. For example, both ink-jet replication technology and dye sublimation technology can produce very accurate color proofing, but their costs are different. Therefore, it is not easy to find a suitable digital proofing method for each customer, because the customer's requirements and preferences are varied.