Based on the analysis of the concept of military meta universe and related technologies，this paper proposes the idea of building a military ecosystem by applying high and new technologies and major projects such as virtual/reality fusion interaction，network information system，etc. The advantages of building cloud services in the military ecosystem are analyzed， which can provide platform and integrated processing and shared transmission services for battlefield information support. In order to adapt to future combat scenarios and missions， the air combat force has both the operational requirements of connecting the network and building the cloud， and the advantages of networking and building the cloud. This paper analyzes the basic concepts and main content of battlefield situation information， focusing its role in all aspects of air combat， and points out that air combat based on real-time battlefield situation information can achieve the goal of Find and Destroy. The air combat cloud kill pattern in the military ecosystem is designed and the method of closing the air combat kill chain based on battlefield situation information is proposed， so as to provide reference for advancing the development of the modern joint operation theory of our army and improving the joint air combat capability.