MotionCtrl is a unified and flexible video generation controller capable of independently and effectively managing camera and object motion. It can guide video generation models based on camera pose sequences and object trajectories, generating videos with complex camera movements and specific object motions. MotionCtrl can also integrate with other video generation methods, such as SVD. Its advantages include the ability to finely control camera and object motion, using appearance-agnostic camera poses and trajectories, adapting to various camera poses and trajectories, and generating videos with a natural appearance.