NOVELTY - A glass substrate is cleaned, washed with deionized water, cleaned using an alkaline cleaning liquid containing water, hydrogen peroxide, and ammonium hydroxide, and thoroughly washed with deionized water. The glass substrate is placed in the aluminum-doped zinc oxide sol at room temperature, and soaking-lifting film method is repeated several times. The formed film is heated for 20 minutes at 200 degrees C. The substrate is placed in the titanium dioxide sol, soaking-lifting film method is repeated several times, and heating is carried out.    USE - Preparation of glass (claimed) for packaging multifunctional solar battery.    ADVANTAGE - The method enables preparation of glass having excellent self-cleaning function, high infrared reflectivity, and high visible-light transmissivity.    DETAILED DESCRIPTION - Industrial titanium tetrachloride is added to deionized water to obtain a solution of concentration 5 mol/L. The solution is allowed to stand for 4 hours and diluted to 0.5 mol/L using deionized water, to obtain a clear solution. Chemically pure aqueous ammonia is added to adjust the pH to 5.5-6.5, to obtain a white turbid solution. The solution is filtered, and the obtained precipitate is washed 6-8 times with deionized water and prepared into a slurry. Hydrogen peroxide is dripped until the precipitate is dissolved, to obtain an organic clear and transparent solution. The obtained solution is heated for 3-6 hours at 95 degrees C and stirred to obtain a neutral yellow transparent solution as titanium dioxide sol. Analytically pure zinc acetate powder and sodium hydroxide pellets are added to absolute ethyl alcohol, stirred to obtain zinc oxide-ethyl alcohol solution, filtered, and aged for 3 days to obtain a slightly milky zinc oxide sol. An aluminum acetate solution is dripped and stirred to obtain an aluminum-doped zinc oxide sol having aluminum/zinc atomic ratio of 1.9-2.1%. A glass substrate is cleaned, washed with deionized water, cleaned using an alkaline cleaning liquid containing water, hydrogen peroxide, and ammonium hydroxide in a ratio of 5:2:1, and thoroughly washed with deionized water. The glass substrate is placed in the aluminum-doped zinc oxide sol at room temperature, and soaking-lifting film method is repeated several times. The formed film is heated for 20 minutes at 200 degrees C. The substrate is placed in the titanium dioxide sol, soaking-lifting film method is repeated several times, and heating is carried out.