A mobile communication device comprising: a foldable housing including a first housing portion and a second housing portion; a first touch display accommodated on an inner side of the housing, which is visible when the housing is at least partially unfolded and substantially invisible from an outside of the communication device when the housing is fully folded; a second touch display accommodated on an outer side of the first housing portion; and a processor; and a memory storing instructions which, when executed by the processor, cause the mobile communication device to: while the housing is unfolded and the second touch display is deactivated, control to display, via the first touch display, a first execution screen corresponding to a first application being executed; in response to the housing being folded from being unfolded while the first execution screen is displayed via the first touch display, control to deactivate the first touch display and, control to display, via the second touch display, a touch lock screen including an indication for removing the touch lock screen; and while the housing is fully folded and the first touch display is deactivated, based on a touch input entered according to the indication within a predetermined time from displaying the touch lock screen, control the second touch display to change from displaying the touch lock screen including the indication to displaying a second execution screen having a size corresponding to the second touch display, according to attributes of the second touch display, based on the first execution screen displayed prior to the folding of the housing, wherein when a touch input is not entered within the predetermined time, display of the touch lock screen is terminated and the second touch display is turned off. a foldable housing including a first housing portion and a second housing portion; a first touch display accommodated on an inner side of the housing, which is visible when the housing is at least partially unfolded and substantially invisible from an outside of the communication device when the housing is fully folded; a second touch display accommodated on an outer side of the first housing portion; and a processor; and a memory storing instructions which, when executed by the processor, cause the mobile communication device to: while the housing is unfolded and the second touch display is deactivated, control to display, via the first touch display, a first execution screen corresponding to a first application being executed; in response to the housing being folded from being unfolded while the first execution screen is displayed via the first touch display, control to deactivate the first touch display and, control to display, via the second touch display, a touch lock screen including an indication for removing the touch lock screen; and while the housing is fully folded and the first touch display is deactivated, based on a touch input entered according to the indication within a predetermined time from displaying the touch lock screen, control the second touch display to change from displaying the touch lock screen including the indication to displaying a second execution screen having a size corresponding to the second touch display, according to attributes of the second touch display, based on the first execution screen displayed prior to the folding of the housing, while the housing is unfolded and the second touch display is deactivated, control to display, via the first touch display, a first execution screen corresponding to a first application being executed; in response to the housing being folded from being unfolded while the first execution screen is displayed via the first touch display, control to deactivate the first touch display and, control to display, via the second touch display, a touch lock screen including an indication for removing the touch lock screen; and while the housing is fully folded and the first touch display is deactivated, based on a touch input entered according to the indication within a predetermined time from displaying the touch lock screen, control the second touch display to change from displaying the touch lock screen including the indication to displaying a second execution screen having a size corresponding to the second touch display, according to attributes of the second touch display, based on the first execution screen displayed prior to the folding of the housing, wherein when a touch input is not entered within the predetermined time, display of the touch lock screen is terminated and the second touch display is turned off.