An LED illumination system includes a plurality of LED lamps. Each of the LED lamps includes: an LED array including one or more LED elements that interoperate with input power and emit light; a power management unit that controls supplied power so that power is input to the LED array; a control unit that controls the power management unit to control an operation of the LED array in response to a signal input set by a user through a user terminal; and a wireless communication module that transmits a received wireless communication signal to the control unit and transmits information received from the control unit in the form of a wireless communication signal.