An LED light emitting device includes an LED light emitting component comprising a visible LED die emitting visible light and an infrared LED die emitting infrared light, a power source driver for providing electric energy for the LED light emitting component, and a temperature sensor for sensing a surface temperature of an outer surface of the LED light emitting component. When a value of the surface temperature is smaller than zero degree Celsius, the temperature sensor outputs a control signal to the power source driver to control the power source driver to supply an electric current to the infrared LED die, whereby the infrared LED die radiates infrared light to melt ice on the outer surface of the LED light emitting component.