[Object] The present disclosure proposes a control device, control method, and computer program capable of executing control such that information can be displayed more appropriately and efficiently according to an environment in which information is displayed or a situation of displayed information. [Solution] Provided is a control device including: an acquisition unit configured to acquire state information obtained by detecting a state of a projection surface; and a generation unit configured to generate control information for controlling an illumination unit that outputs illumination without involvement in display of image information based on the state information.