Intelligent tires are equipped with sensors to monitor strain, rolling radius and pressure of tire, and are expected to improve the reliability of tires and determine the road condition. However, the high stiffness of an attached sensor like a strain gauge causes debonding of sensors from tire rubber. In the present study, an optical method is used for the concurrent monitoring of in-plane strain and out-of-plane displacement (rolling radius) utilizing the non-planar surface of the monitoring object. The optical method enables noncontact measurement of strain. The in-plane strain and out-of-plane displacement are calculated by using image processing with an image of the interior surface of tire that is taken with a single camera fixed in tire. This new monitoring system is applied to commercial tire. As a result, the monitoring system is effective against concurrent monitoring of strain rolling radius. In addition, this monitoring system enables tire pressure monitoring.