The present invention relates to the technical field of electronic products and discloses a water vapor removing method and system. The the method disclosed by the present invention comprises: firstly, acquiring current environment temperature, environment humidity and touch screen temperature by a user; then according to the environment temperature, the environment humidity and the touch screen temperature, determining whether the surface of a touch screen reaches a condition of forming water vapor or not; and if the surface of the touch screen reaches the condition of forming the water vapor, heating the touch screen. According to the embodiment mode of the present invention, compared with the prior art, by acquiring the current environment temperature, environment humidity and touch screen temperature, determining whether the surface of the touch screen reaches the condition of forming water vapor or not in real time, and heating the touch screen when the surface of the touch screen reaches the condition of forming the water vapor, the temperature of the touch screen is increased so as to damage a current condition of forming the water vapor on the surface of the touch screen; and furthermore, the effects, caused by the water vapor formed on the surface of the touch screen, on a user are avoided, a comfortable operation environment is created for the user, and meanwhile, cleaning of the screen is facilitated.