Disclosed are a smart wrist-worn device and an electrocardiogram measurement method for a smart wrist-worn device. The smart wrist-worn device comprises a device housing (11), a device bottom shell (12), a first button, a second button, a first electrode (13) and a second electrode (14), which are arranged on the device bottom shell (12), a first conductive elastic piece (15), a second conductive elastic piece (16), a conductive plate (17), a first feed point elastic piece (18) and a second feed point elastic piece (19), wherein the first conductive elastic piece (15) is connected between a first metal button body (20) of the first button, and the conductive plate (17) the second conductive elastic piece (16) is connected between a second metal button body (21) of the second button, and the conductive plate (17) and the conductive plate (17) is connected to the first electrode (13) and the second electrode (14) by means of the first feed point elastic piece (18) and the second feed point elastic piece (19) respectively. When a finger triggers two buttons at the same time, the two buttons, the two electrodes (13, 14), the two conductive elastic pieces (15, 16), the conductive plate (17), the two feed point elastic pieces (18, 19) and the body form a closed loop. A micro-electrical signal of the closed loop is acquired, and electrocardiogram information can be obtained according to changes in the micro-electrical signal. Using the buttons also as electrodes resolves the existing problem of electrodes affecting radio-frequency performance.Linvention concerne un dispositif porté au poignet intelligent et un procédé de mesure délectrocardiogramme pour un dispositif porté au poignet intelligent. Le dispositif porté au poignet intelligent comprend un boîtier de dispositif (11), une coque inférieure de dispositif (12), un premier bouton, un second bouton, une première électrode (13) et une seconde électrode (14), qui sont disposées sur la coque inférieure de dispositif (12)
