In modern war, target situation assessment has become one of the important factors that affect the overall battlefield trend and determine the final outcome. The accuracy of target situation assessment plays an important role in the combat command decision. How to conduct accurate and effective situation assessment based on the time, position, behavior and other information of each target is the key and difficult point in the field of command and decision making. This paper summarizes and summarizes the methods of target situation assessment, analyzes the advantages and disadvantages of the existing methods of target situation assessment, and looks forward to the next research direction of target situation assessment.