This is a series of the architecture with condensing the construction cost by grasping the architecture parts by parts. Discovering the market and the routes to buy similar parts with the cheapest price all over the world, we will design the list of all parts with calculating the logistics costs. Some parts may be made by self-build system. As a result, it make the black box of the general contract system clear and re-edit roles of the client, the architect and the builder. Depending on the objection like the land and the existed architecture, the suitable radical methods to build will be appeared as design.