An abnormality diagnosis system comprising: a bearing that has a plurality of components (11, 13, 15, 17, 19); a plurality of sensors (21, 22, 23) that are disposed at different positions on one of the components (11, 13, 15, 17, 19) comprised by the bearing, and that are configured to detect surrounding signals; and an abnormality diagnosis device that is configured to diagnose abnormality of the bearing and abnormality of a device (41, 42) disposed around the bearing, based on signals output from the plurality of sensors (21, 22, 23), wherein the components (11, 13, 15, 17, 19) include an inner ring or an outer ring, and wherein the plurality of sensors (21, 22, 23) comprises: a first sensor which is disposed in the vicinity of one axial end portion of the inner ring or outer ring of the bearing; a second sensor which is disposed in the vicinity of a raceway surface of the inner ring or outer ring of the bearing; and a third sensor which is disposed in the vicinity of the other axial end portion of the inner ring or outer ring of the bearing, wherein the plurality of sensors (21, 22, 23) is temperature sensors or vibration sensors or load sensors, respectively, wherein the abnormality diagnosis system includes a first device disposed at one axial end-side of the bearing and a second device disposed at the other axial end-side of the bearing, wherein the abnormality diagnosis device is configured to specify a sensor which output value firstly increases or which output value firstly exceeds a predetermined threshold value, from the plurality of sensors (21, 22, 23) and to determine which of the bearing, the first device and the second device is abnormal, based on a position at which the specified sensor is disposed. a bearing that has a plurality of components (11, 13, 15, 17, 19); a plurality of sensors (21, 22, 23) that are disposed at different positions on one of the components (11, 13, 15, 17, 19) comprised by the bearing, and that are configured to detect surrounding signals; and an abnormality diagnosis device that is configured to diagnose abnormality of the bearing and abnormality of a device (41, 42) disposed around the bearing, based on signals output from the plurality of sensors (21, 22, 23), wherein the components (11, 13, 15, 17, 19) include an inner ring or an outer ring, and wherein the plurality of sensors (21, 22, 23) comprises: a first sensor which is disposed in the vicinity of one axial end portion of the inner ring or outer ring of the bearing; a second sensor which is disposed in the vicinity of a raceway surface of the inner ring or outer ring of the bearing; and a third sensor which is disposed in the vicinity of the other axial end portion of the inner ring or outer ring of the bearing, wherein the plurality of sensors (21, 22, 23) is temperature sensors or vibration sensors or load sensors, respectively, wherein the abnormality diagnosis system includes a first device disposed at one axial end-side of the bearing and a second device disposed at the other axial end-side of the bearing, wherein the abnormality diagnosis device is configured to specify a sensor which output value firstly increases or which output value firstly exceeds a predetermined threshold value, from the plurality of sensors (21, 22, 23) and to determine which of the bearing, the first device and the second device is abnormal, based on a position at which the specified sensor is disposed. a first sensor which is disposed in the vicinity of one axial end portion of the inner ring or outer ring of the bearing; a second sensor which is disposed in the vicinity of a raceway surface of the inner ring or outer ring of the bearing; and a third sensor which is disposed in the vicinity of the other axial end portion of the inner ring or outer ring of the bearing, wherein the plurality of sensors (21, 22, 23) is temperature sensors or vibration sensors or load sensors, respectively, wherein the abnormality diagnosis system includes a first device disposed at one axial end-side of the bearing and a second device disposed at the other axial end-side of the bearing, wherein the abnormality diagnosis device is configured to specify a sensor which output value firstly increases or which output value firstly exceeds a predetermined threshold value, from the plurality of sensors (21, 22, 23) and to determine which of the bearing, the first device and the second device is abnormal, based on a position at which the specified sensor is disposed.