The invention relates to an intelligent dimming toning method and a device for a multi-color LED illumination light source and relates to an LED illumination light source. The intelligent multi-color LED illumination light source is provided with a power source module, a driving control module and an LED illumination module, wherein the power source module is provided with an AC-DC unit and a DC-DC unit, the power source module is connected with a power source port of the driving control module, the driving control module is provided with a wideband antenna, a multi-mode radio frequency processing unit, a data storage unit, a single-chip microcomputer, a constant current driving unit, a power source port, a feedback port and a driving bus port, and the LED illumination module is provided with a distributed temperature sensor, a red light LED, a green light LED, a blue light LED and a white light LED. According to the intelligent multi-color LED illumination light source, compatibility of and support for the multi-mode wireless networking technology can be realized; on the basis of the white light LED, through collocation of the red, green and blue light LEDs, the color temperature of the mixed-color light is adjustable, high color rendering is realized, and no-lower-than-95 high color rendering indexes can be realized.