The present disclosure provides a remote controller, a lighting device and a lighting system. The remote controller is configured for controlling color of light emitted by a target lighting device and includes: a housing; a main control panel of a remote control terminal, located in the housing and provided with a color acquiring circuit for acquiring color information of a target region, and a wireless transmitter for transmitting the color information to the target lighting device; a color acquiring switch, located on the housing and electrically connected with both the color acquiring circuit and the wireless transmitter, and the color acquiring switch being configured for turning on/off the color acquiring circuit and the wireless transmitter. The remote controller has a simple structure and convenient operation, so that the color of the light emitted by the lighting device may be freely adjusted according to individual needs, which is convenient.