A user terminal device has a computer, a software for the user terminal device, a telephone, a video camera and a virtual office display device. Generally, working state, condition or the like of another user is displayed on a screen of the virtual office display device. A user's state is recognized on the basis of an image of the user taken by the video camera. In a case where the user continuously looks toward the virtual office display device for a period longer than a time previously determined by the user, the screen of the virtual office display device is switched to a rest room screen, and the user is moved to a rest room in a virtual space. In that rest room, the user can communicate with another user utilizing a cooperative rest tool. The cooperative rest tool includes a voice meeting tool, a character meeting tool and a multiuser game tool.