For big area CCD camera of high frame frequency, there are several disadvantages as great image data size, low real time storage and loss of gray scale in high definition image display, so in this paper, a system for high-capacity storage and high-definition display is designed. Firstly, according to the characteristics of the CCD cameras, the composition of high-capacity storage and high-definition display system was introduced in detail. Secondly, to meet the requirement of high data storage, the read-write mode of Ultra DMA of SATA hard-disk was specially designed; secondly, the design of DVI interface was elaborated for the high-definition display with 12 bits. Finally, the storage speed was tested, and the images presented with ordinary display and high-definition display were compared. Experimental results indicate that the system in the pattern of Ultra DMA, actual highest transmission speed can reach 85 MB/s and the images displayed with 12-bit high-definition display realize higher contrast ratio. So the real-time image storage is greatly improved without display loss of high gray scale level images.