Aiming at the requirement of image collection and processing for long wave linear 5k×6 detector device,a multipath,large data amount ,high-speed and real-time image collection and processing system was designed and implemented. Image collection interface is five routes parallel CameraLink protocol and image acquisition card chooses 3 Xcelera-CL_PX4 in DALSA. Firstly,five routes image data are collected,which the data of every route are 1024×8889×16bit. Then,the images are processed by joint,non-uniformity correction,histogram equalization. The experimental results demonstrate that the system is stable and reliable for multipath,high resolution and real-time processing system,and the system has been applied to NETD and MTF testing system.