An electronic device comprising: a touch screen display; an input/output interface connectable to an external display device; a communication circuit in communication with a server, and configured to receive, from the server, a list of applications that support a resizing of a window configured to display an execution screen of the application; a memory; and a processor electrically connected to the touch screen display, the input/output interface, the communication circuit, and the memory, wherein the processor is configured to: modify screen configuration information associated with at least one of a resolution, a density, and an orientation of a screen output by the electronic device if the electronic device is connected to the external display device through the input/output interface; determine whether a target application to be displayed on the external display device supports resizing of a window configured to display an execution screen of the target application based on the list received from the server; configure a first type of window which is resizable, based on the modified screen configuration information and the execution screen of the target application if the target application supports resizing, configure a second type of window with a fixed size, based on the modified screen configuration information and the execution screen of the target application if the target application does not support resizing; and provide the screen output by the electronic device including the first type of window or the second type of window to the external display device. a touch screen display; an input/output interface connectable to an external display device; a communication circuit in communication with a server, and configured to receive, from the server, a list of applications that support a resizing of a window configured to display an execution screen of the application; a memory; and a processor electrically connected to the touch screen display, the input/output interface, the communication circuit, and the memory, wherein the processor is configured to: modify screen configuration information associated with at least one of a resolution, a density, and an orientation of a screen output by the electronic device if the electronic device is connected to the external display device through the input/output interface; determine whether a target application to be displayed on the external display device supports resizing of a window configured to display an execution screen of the target application based on the list received from the server; configure a first type of window which is resizable, based on the modified screen configuration information and the execution screen of the target application if the target application supports resizing, configure a second type of window with a fixed size, based on the modified screen configuration information and the execution screen of the target application if the target application does not support resizing; and provide the screen output by the electronic device including the first type of window or the second type of window to the external display device. modify screen configuration information associated with at least one of a resolution, a density, and an orientation of a screen output by the electronic device if the electronic device is connected to the external display device through the input/output interface; determine whether a target application to be displayed on the external display device supports resizing of a window configured to display an execution screen of the target application based on the list received from the server; configure a first type of window which is resizable, based on the modified screen configuration information and the execution screen of the target application if the target application supports resizing, configure a second type of window with a fixed size, based on the modified screen configuration information and the execution screen of the target application if the target application does not support resizing; and provide the screen output by the electronic device including the first type of window or the second type of window to the external display device.