A very convenient roller shutter system, which improves thermal and sound insulation across the windows while reducing energy consumption, especially in terms of winter heating. The access hatch position is configurable: in the front or bottom with the hatch swung open into the room, or an access hatch on the window exterior. Once the access hatch position has been decided, make the installation and trim finish that will make it easy to open the access hatch door. The optional roller insect blind can be installed on the inner side of the curtain to increase the convenience of use.