Abstract: The novel technology of flexible electronics (also called macroelectronics) is built on flexible and deformable substrates. Due to flexibility and deformability, the technology has found wide applications in many fields. Flexible electronics products have similar structural morphologies and material properties, it is vital to study the mechanical properties of flexible electronics system. This paper presents a state-of-the-art review of the background and technological development of flexible electronics system, and is organized as follows. The concept and applications of flexible electronics system are presented firstly. Then it reviews their basic structures, material properties and manufacture technique, focusing on the mechanical properties of their key structural components, also the future investigations on mechanical properties are briefly recommended at last.