The invention discloses a light-emitting
diode (LED) four-color light supplemental device of a
plant. The light supplemental device of the
plant comprises a red-light
LED array, a blue-light
LED array, a far-red-light
LED array, a green-light LED array, a substrate 5 and a
control circuit, wherein the red-light LED array, the blue-light LED array, the far-red-light LED array and the green-light LED array are sequentially and fixedly arranged on the substrate 5, and the
control circuit is used for controlling the red-light LED, the blue-light LED, the far-red-light LED, and the green-light LED to supplement light. According to the light supplemental device of the
plant and a light supplemental method of the plant, the four-color light LED with a specific specification is selected, not only are
colored lights which have a plurality of wavelengths and specific effects on plants by means of centralization of a variety of
photosynthesis considered, but also economy and practicability are further taken into account. Meanwhile, considering the comfort of the human eyes, the four-color light LED with normal colors such as red, blue, far-red and green are selected. When the color lights are selected, according to the power of the selected LED with various colors, a reasonable ratio of R / B, R / FR and R / G can be obtained through the
control circuit, thus the
photosynthesis of the plant and the comfort requirement of the eyes of human can be met, and the requirements of orientation of cultivation of the plant with the need of participation of human can be better met.