The utility model relates to an energy-saving cleaning device which utilizes the two media of gas and liquid to carry out blowing and washing cleaning with certain pressure according to the order that the gas is used first and then the liquid, is applied to cars, closestools, glass, and the like (taking cleaning of closestool sewage as an example), and can reduce tap water consumption significantly to achieve the purposes of energy conservation and emission reduction. The device mainly comprises an air pressurization part, a water yield adjusting device, a water storage washing part, and a blow and suck pipe. When the device works, compressed air is utilized to blow and wash sewage in a sewer line which is arranged at the bottom of a closestool first, tap water enters into a pressurization chamber to wash the surface of the closestool through pressurization, and then the tap water is discharged into the sewer line. The device is simple in structure, low in achieving cost, convenient to operate, and significant in energy conservation and emission reduction effect.