Sandwich panel system is a lightweight, energy efficient and economic construction technique for civil infrastructures. They consist of concrete wythes, lightweight core material and connectors. The objective of this paper is to present the past findings and highlight the current trends in research. In this paper, the types of sandwich panels, their constituents, design considerations, test methodology and their failure modes are reviewed along with the porous concrete properties and test methods. Based on this, a novel sandwich panel with an idea of porous concrete as a lightweight core material has been obtained and is discussed.