In order to analyze and plan the responsive space military mission, research the responsive space operation theory, and put theoretical support for responsive space operation simulation. This paper presents the responsive space military mission conceptual modeling method based on systems modeling language (SysML). Based on the introduction and analysis of SysML and its conceptual modeling method, the abstract conceptual model of responsive space military mission is established, moreover a typical case of responsive space reconnaissance is analyzed. The results show that the method is feasible to analyze and plan the responsive space military mission, and providing a theoretical reference for research the responsive space operation theory