Provided are a modal window control method, a device, and a storage medium. The method comprises: acquiring a modal window structure, and adding the modal window structure to a modal stack; in response to updating a state of each window existing at a current interface according to a created loop update event, extracting a system event from a system message queue; in response to a modal window existing at the current interface, determining whether the modal window is the same as a window pointed by a structure located on a top of the modal stack; and in response to the modal window being the same as the window pointed by the structure located on the top of the modal stack, controlling the window located on the top of the modal stack to process the system event.