An optical image stabilization system, an imaging device, and an electronic device are provided. The optical image stabilization system includes a micro electro-mechanical system (MEMS), and an image sensor. The MEMS includes a fixed electrode, a movable electrode, and a deformable connection member. The movable electrode cooperates with the fixed electrode. The deformable connection member is configured to fixedly connect the fixed electrode with the movable electrode. The image sensor is fixedly connected to the movable electrode. The fixed electrode and the movable electrode are configured to generate an electrostatic force under a driving voltage. The deformable connection member is configured to deform under the electrostatic force in a direction where the movable electrode moves, to make the movable electrode move, so as to drive the image sensor to move.