The present invention relates to a method for configuring a large light weight sandwich plate structure that can be assembled in the engineering, construction site. The sandwich plate structure is composed of up / down faceplate (face sheet) and the intermediate trusses. Truss takes the form of a three-dimensional Octet, three-dimensional Kagome flute mid truss and made into a pipe. Pipe forming the intermediate truss can be top or end of the lower two UP / DOWN stay connected to the joint (pin joint) pin on one of the face plates folded up / down faceplate regular form on one plane of which the other end of the pipe end is connected in a simple mechanical way to temporarily rest the face plate. So raise up a pipe attached to the collapsed remains one of the top / bottom faceplate during field assembly, you only need to join the ends on the other side of the faceplate is composed of a sandwich plate form it is completed. Conversely, if you want to put aside to dismantle one of the up / down faceplate, loosen a pipe connected to a part coupled with a temporary pin joints. Therefore, if you are easily installed in the field to the plate sandwich structure and arrangement of the pipes of the pipe is fixed and can be used repeatedly by easy transportation and storage by reducing the volume easily disassembled when disassembly. Light and high in mechanical strength and stiffness due to mechanical it has a structure ideal, and it can take advantage of an empty space in the passage for the purpose of, store, transfer, and wiring. Truss structure, octet truss, Kagome truss, a pyramid truss, lightweight structural sandwich plate structures