The invention provides a method and a device for automatically adjusting glasses. The methodfor automatically adjusting the glasses comprises the following steps: detecting whether or not feature parameters of a pair of smart glasses are matched with application scene parameters of the pair of smart glasses; when the feature parameters are matched with the application scene parameters, adjusting the feature parameters according to the application scene parameters. Through adjustment of the feature parameters, the pair of smart glasses can adapt to different application scenes, the demands of a user under different scenes are met; complex operation for preparing a plurality of kinds of glasses is reduced; the cost of replacement of the glasses is lowered for the user.