A control apparatus and method and an electronic device. Wherein, the apparatus includes: a communicating unit configured to establish communication connection with a controlled object; an image acquiring unit configured to obtain a preview image containing the controlled object; and a controlling unit configured to receive a control instruction inputted according to the preview image, and control the controlled object according to the control instruction. Controlling the controlled object according to the preview image containing the controlled object may realize control of the controlled object in a simple and convenient manner, thereby improving user experiences.