Emerging liquid metals provide an excellent combination of conductivity and deformability at room temperature. These liquid metals offer promising opportunities for electronics that are flexible, stretchable and even reconfigurable. At present, the main applications of liquid metals are flexible printed circuits, soft sensors for robotics, wearable or implantable electronics, e-skin and so on. Research the flexible circuits and devices fabricated by liquid metals are interesting and exciting. Besides, there also remain exciting opportunities as well as interesting fundamental materials questions for liquid metals in the future.