A sensor substrate and an electronic device are disclosed. The sensor substrate includes a base substrate and a plurality of sensor units spaced apart from each other, each sensor unit includes a hollowed-out electrode and a matching electrode spaced apart from each other, one of the hollowed-out electrode and the matching electrode is a sense electrode and the other is a drive electrode. An orthographic projection of the hollow-out electrode on the base substrate includes an inner edge and an outer edge at an outer side of the inner edge. An orthographic projection of the matching electrode on the base substrate includes a portion at an inner side of the inner edge.