<p>Over the past few decades, multi-spacecraft and multi-target problems have attracted significant attention from the research community, resulting in numerous studies on orbital dynamics and control methods for these problems. With the advancement of aerospace technology, increasingly complex and novel multi-spacecraft and multi-target problems have emerged, such as mega-constellation design and multi-spacecraft multi-target cooperative interception, which present both new challenges and opportunities for orbital dynamics and control. To provide a comprehensive overview of this field, this paper summarizes existing orbital dynamics and control methods for several categories of multi-spacecraft and multi-target problems, including multi-spacecraft orbital design (covering spacecraft formation flying and constellations), multi-spacecraft multi-target visit trajectory optimization, and collision avoidance and cooperative interception. Potential directions for future research are also discussed.</p>