A method for controlling a wearable electronic device, the method comprising: determining whether the electronic device is attached to a human body; when it is determined that the electronic device is attached to the human body, measuring bio-information signals from the human body using said electronic device, said bio-information signals including at least an electromyogram signal and an electrocardiogram signal, and obtaining (410, 510, 810, 1410) information regarding a worn portion of the human body on which the electronic device is worn based on the electromyogram, 'EMG', signal and the electrocardiogram, 'ECG', signal; the method further comprising the steps of: obtaining the worn portion by: comparing the EMG signal measured from the worn portion when the user wears the electronic device with characteristic information on the EMG signal for each body part previously stored; and comparing the ECG signal measured from the worn portion when the user wears the electronic device with characteristic information on the ECG signal for each body part previously stored; determining (520, 820) a mode determination signal based on the information regarding the worn portion, the mode determination signal being either the ECG signal or the EMG signal; and controlling (320, 420, 540, 830) the electronic device or another electronic device inter-workable with the electronic device based on the determined mode determination signal. determining whether the electronic device is attached to a human body; when it is determined that the electronic device is attached to the human body, measuring bio-information signals from the human body using said electronic device, said bio-information signals including at least an electromyogram signal and an electrocardiogram signal, and obtaining (410, 510, 810, 1410) information regarding a worn portion of the human body on which the electronic device is worn based on the electromyogram, 'EMG', signal and the electrocardiogram, 'ECG', signal; the method further comprising the steps of: obtaining the worn portion by: comparing the EMG signal measured from the worn portion when the user wears the electronic device with characteristic information on the EMG signal for each body part previously stored; and comparing the ECG signal measured from the worn portion when the user wears the electronic device with characteristic information on the ECG signal for each body part previously stored; determining (520, 820) a mode determination signal based on the information regarding the worn portion, the mode determination signal being either the ECG signal or the EMG signal; and controlling (320, 420, 540, 830) the electronic device or another electronic device inter-workable with the electronic device based on the determined mode determination signal. obtaining the worn portion by: comparing the EMG signal measured from the worn portion when the user wears the electronic device with characteristic information on the EMG signal for each body part previously stored; and comparing the ECG signal measured from the worn portion when the user wears the electronic device with characteristic information on the ECG signal for each body part previously stored; comparing the EMG signal measured from the worn portion when the user wears the electronic device with characteristic information on the EMG signal for each body part previously stored; and comparing the ECG signal measured from the worn portion when the user wears the electronic device with characteristic information on the ECG signal for each body part previously stored; determining (520, 820) a mode determination signal based on the information regarding the worn portion, the mode determination signal being either the ECG signal or the EMG signal; and controlling (320, 420, 540, 830) the electronic device or another electronic device inter-workable with the electronic device based on the determined mode determination signal.