An intelligent wearable device (1) and system having an alarm function, comprising: an alarm detection apparatus (11), a main control apparatus (12), an evidence collection apparatus (14) and an alarm transmission apparatus (13). When the alarm detection apparatus (11) determines that an abnormal situation has occurred, the alarm detection apparatus (11) sends an alarm signal to the main control apparatus (12) the main control apparatus (12) alarms according to the alarm signal and the evidence collection apparatus (14) acquires evidence collection information, and the alarm transmission apparatus (13) sends the alarm information and evidence collection information to a background operation server (2). The intelligent wearable device (1) and system support various alarm ways, automatically send the alarm information to the background operation server (2) and can also send the alarm information to a designated contact person at the same time, the background operation server (2) sends the alarm information to a public security department, a medical department, a fire department, a traffic management department and so on so as to handle the warning condition, an environment safety monitoring function and a food safety monitoring function are achieved, and the situation that no person accepts the alarm can be avoided.
