Testing system and tesint method for image processing algorithm

A testing system for an image processing algorithm including a control unit, an image processing device, an image processing hardware, and a testing device is disclosed. The control unit provides an original image and parameter values. The image processing device obtains the original image and the parameter values, and drives the image processing hardware to perform a first image processing procedure to the original image based on the parameter values to generate a hardware-processed image. The testing device obtains the original image, the parameter values and the hardware-processed image, performs a second image processing procedure, through executing a simulation software, to the original image based on the parameter values to generate a software-processed image. And, the testing device compares the hardware-processed image and the software-processed image through executing a testing software to generate a comparing result that represents a pixel difference of the hardware-processed image and the software-