A wearable device, comprising: a body and a detection electrode, wherein the body comprises an electrocardiosignal collection circuit, and an inner electrode and an outer electrode that are electrically connected to the electrocardiosignal collection circuit, the inner electrode is configured to collect an electric potential signal of a first wearing position, the outer electrode is configured to collect an electric potential signal of a non-wearing position, the detection electrode can move relative to the body, the detection electrode is configured to electrically connect to the electrocardiosignal collection circuit and collect an electric potential signal of a second wearing position, and the non-wearing position and the second wearing position are different from the first wearing position; wherein the body comprises a watch face and a watch band connected to the watch face, the watch face comprises a housing and a circuit board located inside the housing, and the circuit board is configured to bear the electrocardiosignal collection circuit; wherein the housing comprises a bottom wall and a side wall disposed around a periphery of the bottom wall, the bottom wall is configured to be in contact with the first wearing position, the inner electrode is fastened to the bottom wall, and the outer electrode is fastened to an end portion that is of the side wall and that is far away from the bottom wall; characterized in that the bottom wall is disposed with a first through hole, the watch face further comprises a fixed circuit board electrically connected to the circuit board, the fixed circuit board is disposed with a second through hole and a pad located on a periphery of the second through hole, the inner electrode comprises an electrode plate and a connection base connected to the electrode plate, the watch face further comprises a screw, the connection base extends into the first through hole, and the screw is connected to the connection base after passing through the second through hole, so that the connection base is in contact with the pad, wherein the pad is electrically connected to the electrocardiosignal collection circuit by using the fixed circuit board and the circuit board; wherein the pad comprises a first subpad and a second subpad that are disposed opposite to each other, the first subpad is disposed on a side that is of the fixed circuit board and that faces the connection base, the first subpad is in contact with the connection base, the second subpad is disposed on a side that is of the fixed circuit board and that is far away from the connection base, the second subpad is in contact with the screw, and the screw is made of a conductive material, and is configured to enable the connection base to be electrically connected to the second subpad by using the screw. wherein the body comprises a watch face and a watch band connected to the watch face, the watch face comprises a housing and a circuit board located inside the housing, and the circuit board is configured to bear the electrocardiosignal collection circuit; wherein the housing comprises a bottom wall and a side wall disposed around a periphery of the bottom wall, the bottom wall is configured to be in contact with the first wearing position, the inner electrode is fastened to the bottom wall, and the outer electrode is fastened to an end portion that is of the side wall and that is far away from the bottom wall; characterized in that the bottom wall is disposed with a first through hole, the watch face further comprises a fixed circuit board electrically connected to the circuit board, the fixed circuit board is disposed with a second through hole and a pad located on a periphery of the second through hole, the inner electrode comprises an electrode plate and a connection base connected to the electrode plate, the watch face further comprises a screw, the connection base extends into the first through hole, and the screw is connected to the connection base after passing through the second through hole, so that the connection base is in contact with the pad, wherein the pad is electrically connected to the electrocardiosignal collection circuit by using the fixed circuit board and the circuit board; wherein the pad comprises a first subpad and a second subpad that are disposed opposite to each other, the first subpad is disposed on a side that is of the fixed circuit board and that faces the connection base, the first subpad is in contact with the connection base, the second subpad is disposed on a side that is of the fixed circuit board and that is far away from the connection base, the second subpad is in contact with the screw, and the screw is made of a conductive material, and is configured to enable the connection base to be electrically connected to the second subpad by using the screw.