Disclosed herein is a smart antenna system including an antenna body with changeable directivity, and a control device that optimizes receiving conditions of the antenna body by changing the directivity of the antenna body with a control signal based on a selected channel. The antenna body has a reception confirming section that, when a control signal is output from the control device, outputs to the control device a cognitive signal indicating the receipt of the control signal; and the control device has a failure determination section to determine that the antenna body fails when a cognitive signal is not received, and a failure reporting section to notify that the antenna body fails based on a result from the failure determination section.