The present invention relates to a wearable device capable of easily attaching/detaching a sensor for detecting a biological signal, and a method for controlling the wearable device. The wearable device comprises: a wearing part configured to assist a user in wearing the wearable device on a body part of the user； a first interface part configured to receive a biological signal from a sensor installed in the wearable device； a control unit configured to generate biological information based on the received biological signal； and an output unit configured to output the generated biological information.생체 신호를 검출하는 센서를 쉽게 착탈할 수 있는 웨어러블 디바이스 및 그 웨어러블 디바이스를 제어하는 방법에 관한 것이다.
