The invention discloses an intelligent illumination moisture prevention and energy-saving ceiling lamp. The intelligent illumination moisture prevention and energy-saving ceiling lamp comprises a controller, a plurality of LED lamps, a thermopile infrared sensor, a light ray sensor, a time delay circuit, a brightness control circuit, a thyristor and a power supply device. The LED lamps and the thermopile infrared sensor are all arranged in a toilet. The surfaces of the LED lamps and the surface of the thermopile infrared sensor are sealed through waterproof layers. The controller is connected with the thermopile infrared sensor, the brightness control circuit, the time delay circuit and the thyristor and controls the time delay circuit, the brightness control circuit and the thyristor to work according to data sent by the thermopile infrared sensor and the light ray sensor. The intelligent illumination moisture prevention and energy-saving ceiling lamp can automatically detect the brightness of the external environment light, regulate the brightness of the LED lamps according to the surrounding environment, automatically detect whether people exist in the toilet or not and intelligently turn on or turn off the lamps according to the detection result of the people in the toilet, the automation degree is improved, the electric energy is saved, and household expenses are reduced.