The EPS mobile toilet is a prefab model that made by new concept of environmental protection and economic activities. The mobile toilet uses galvanized steel as frame, sandwich panels as the building envelope materials, with a standard module for space series. Its components are connected by bolt. It can be also quickly. easily assembled and disassembled, leading the temporary buildings to achieve a common standard and establish the environmental protection and energy saving, fast and efficient architectural concept. And this also leads temporary housing into a series development, integrated production, matching of supply, inventory and repeated use of stereotypes revolving products.