Abstract: A structure of building that is free of formwork removal includes a surface panel, two grid bodies, and connectable connection bars. The surface panel has spillage sections. The grid bodies are spaced from each other and define therebetween a grouting space. One of the grid bodies is fixed to the surface panel. Each of the grid bodies includes longitudinal strengthening rebars and lateral strengthening rebars, which extend longitudinally and laterally to interconnect each other at nodal points. The longitudinal or laterally strengthening rebars of grid body are arranged to alternate with respect to those of the other grid body. Each connection bar is set in a tortuous form connecting between the grid bodies so that each nodal point is connected to two of the nodal points of another grid body that are closest to the nodal point and each nodal point is connected by at least two differently-oriented connection bars.