With a complex composition structure, the UTDWS (Universal Terminal Defense Weapon System) has a large amount of network communication data between systems and it lacks of effective fault isolation and positioning means at the development stage, and effective precision evaluation means at the test stage. Aiming at the facts above, the method of network packet capture, data analysis, and precision statistics methods is used to design and implement data recording and assessing equipment for the UTDWS. The equipment has achieved good results in the closed loop test of the weapon system, and can effectively improve the efficiency of scientific research, production, and test of weapon system.