The present invention relates to wearable device and method for providing feedback information through vein authentication or measurement of body composition, and more specifically, comprises a measurement module which identifies an individual through a vein authentication of a user, and which measures a body composition of the user, a control module for calculating the health status by using the measured data, and a communications module for transmitting the measured body composition information or vein information to a management server, while also receiving feedback information with respect to the information received by the management server. According to the present invention, when measuring an exercise amount of user, not only the movement of the user, but also other physical information such as age, gender, height, weight, and body composition are analyzed and reflected to more accurately measure. Also, the present invention is capable of providing fitness equipment information, sports goods information, food information and coupons which help a user achieve goals in the amount of muscle, body fat, and the like, based on the user body composition and exercise amount information provided. Moreover, the present invention allows any user to conveniently measure the body composition autonomously, thereby providing anyone with easy and frequent autodiagnosis. In addition, the present invention is capable of comprehending the amount of activities in the respective body parts, and comparing the amount of muscle and body fat among the different body parts. Therefore, with the compared information notified to the user, the user can be helped to make more balanced body.COPYRIGHT KIPO 2017본 발명은 정맥인증 또는 체성분 측정을 통한 피드백 정보 제공 웨어러블 디바이스 및 방법에 관한 것으로서, 보다 상세하게는 사용자의 정맥인증을 통해 개인을 식별하며, 사용자의 체성분을 측정하는 측정모듈, 측정된 사용자의 상태로부터 건강상태를 계산하는 제어모듈 및 관리서버에 측정된 체성분 정보 또는 정맥 정보를 송신하고, 관리서버로부터 송신한 정보에 대한 피드백 정보를 수신하는 통신모듈을 포함한다.본 발명은 사용자의 운동량을 측정하는 데에 있어 사용자의 움직임뿐만 아니라 사용자의 나이, 성별, 신장, 몸무게,
