Abstract: With the development of the charged coupled device (CCD), complementary metal oxide semiconductor (CMOS), digital image processing and electronic components, the image quality of the digital camera has also developed a lot in the past ten years. The decline of the machining cost makes electro-optical imaging system used extensively in all kinds of fields, so the test and evaluation of the imaging capacity of the imaging system are also paid a lot attention. Digital camera(DC) can put out the digital image which can be identified and automaticly processed by the computer, and make it possible that the image quality of the digital camera can be evaluated objectively.Based on the DC standards,this paper studies methods of the objective evaluation and calculation of the DC parameters.Finishing the evaluation of single parameters,this paper makes a integrated grade from the DC using attribute math.