In this study,The aluminum doped zinc oxide thin films with low resistance and high conductivity is deposited on a glass substrate by radio frequency magnetron sputtering and vacuum annealing.We study the electrical, optical and thermal properties of the zinc-aluminum oxide thin films.It can be found that the annealed AZO thin films in vacuum at 500 degrees for 1 minute has average transmittance of 84.58% in visible light (380~780nm), and the thin films has the lowest sheet resistance (29.84Ω/sq.).The power supply is connected to both ends to give a fixed voltage of 9V, so that the AZO thin films is heated. The AZO thin films temperature before the temperature rise is 22 ˚C, and the temperature rise of the thin films reaches about 55 ˚C in 200 seconds. The thin films heat is distributed evenly.