Provided is an ultrasound device comprising, ultrasonic probes, a transceiver configured to deliver transmission signals to the ultrasonic probes and receive reception signals from the ultrasonic probes, channels configured to deliver the transmission signals and the reception signals, a relay unit configured to select a target ultrasonic probe connected to the channels among the ultrasonic probes, a controller configured to generate a test input signal and a selection signal, and a signal output unit configured to select a target channel among the channels based on the selection signal and output the test input signal to the target channel.