An electronic device is provided. The electronic device includes a housing having a wearable shape configured to be worn on a human body, a coupling device disposed to at least one area of the housing and changeable from a first state to a second state so that the housing is coupled to an external object, an input signal generating device for generating an input signal when the coupling device is changed to the second state, and a control circuit configured to execute at least one instruction on the basis of at least one input signal generated from the input signal generating device.