A light emitting diode (LED) illuminating apparatus (100) includes a controller (20) and an illuminating member (10). The controller is configured for setting a luminance of the LED illuminating apparatus and creating a luminance level value according to the luminance. The illuminating member includes a processor (13), a regulating circuit (15) and an LED lamp (17), the processor is connected to the controller to store the value, the regulating circuit is connected to the processor to receive signals transformed from the value and form output currents sent to the LED lamp according to the signals, thus the LED lamp emits light has the predetermined luminance.