Due to war and poverty and other factors, more and more people become homeless and need help, especially when they need to get through cold winter nights in their cities. Each homeless person wants a home. This design will provide them with some help. It is like a door that everyone can open it, so that people with it will have a warm feeling of entering home. The surface can absorb the solar heat and store heat during the daytime. Then, it begins to heat wanderers’ body and keep the temperature during the night. It will surely make thousands of homeless people feel not cold in this winter.