The invention provides an LED illumination device and system. The LED illumination device comprises a power supply unit, a processor unit, a communication unit, an LED illumination unit, an audio playing unit and a first laser unit, wherein the power supply unit, the audio playing unit, the communication unit, the LED illumination unit and the first laser unit are electrically connected with the processor unit. The communication unit is used for receiving a first control command, first audio information and at least one piece of first image information from a control device, and sending the command and the information to the processor unit, and the processor unit is used for receiving the command and the information, controlling the LED illumination unit to be turned off, controlling the audio playing unit to play the first audio information and controlling the first laser unit to project the first image information on a first plane. The function of a dancing lamp can be achieved through the LED illumination device, so that a user does not need to use an entity dancing blanket any more, the dancing blanket does not need to be stored any more, and thus the user experience is improved.