The invention discloses a data processing method and device capable of enabling a set display window to display in two different states. The data processing method includes steps of detecting whether an operating state of electronic equipment meets preparatory conditions of switch or not, and if yes, generating a switch command; switching a display state in the set display window from a first state to a second state according to the switch command, wherein the set display window of the first state includes first information, the set display window of the second state includes second information, and information content of the first information is greater than that of the second information. By the data processing method, contents in the set display window are concealed, so important contents in the set display window are prevented from being divulged, and confidentiality of the set display window is improved.