The invention provides a browser mode switching method. The browser mode switching method comprises the following steps: receiving a mode switching instruction, and acquiring a display node tree of a currently browsed page according to the mode switching instruction; switching element background colors of display nodes on the display node tree according to background colors corresponding to a predetermined mode; performing brightness linear adjustment on the switched element background colors of the display nodes; and performing color linear adjustment on the element background colors of the display nodes after the brightness linear adjustment. The invention further provides a browser mode switching device. According to the browser mode switching method and the switching device provided by the invention, through the color and brightness adjustments of the element background colors of the display nodes of the display node tree of the currently browsed page, the browser mode switching can be realized; besides, the above adjusting mode can be compatible with browsers with different Chromium kernel versions.