Aiming at the current evaluation methods of technical contribution rate are mostly based on static combat networks with low credibility of the evaluation results,an evaluation method of technical contribution rate of U.S. aircraft carrier combat system-of-systems considering the influence of time and space is proposed.The U.S. aircraft carrier combat network model considering time and space factors is constructed based on OODA (observation,orientation,decision,action) operation loop.The effectiveness evaluation method of combat system-of-systems based on self-information is proposed. Combining the degree of technical support for equipment combat technical indicators, an evaluation model of technical contribution rate is established.Taking the air defense and anti-missile combat system-of-systems of the U.S. aircraft carrier as an example,the results show that the proposed method fully takes into account the spatial-temporal dynamic characteristics of the combat network,which can assess the contribution rate of technology more realistically and objectively,and support for the equipment project approval demonstration and technology optimization development.