Embodiments of the present invention disclose a smart wearable device, where the smart wearable device includes a detection apparatus and a case, the detection apparatus specifically includes one set of measuring parts and a plurality of sets of light emitting parts； the one set of measuring parts and the plurality of sets of light emitting parts are inlaid into the case and arranged into a polygon, where each of the plurality of sets of light emitting parts and the one set of measuring parts each occupies one of a plurality of angles of the polygon, and a central position of the polygon is at a specified distance to each angle of the polygon. A specific embodiment of the present invention provides a smart wearable device. One set of measuring parts and a plurality of sets of light emitting parts are disposed into a case and arranged into a polygon. This enlarges a distance between the one set of measuring parts and the plurality of sets of light emitting parts of the smart wearable device, so as to increase a modulation depth of a detection result of the measuring parts. In addition, a central position of the case is left vacant to accommodate another device.
