TIRE PRESSURE MONITORING SYSTEM AND TIRE PRESSURE MONITORING METHOD

A tire pressure monitoring system is used for a vehicle, and includes: a sensor unit (3) that is provided at each wheel of the vehicle, detects tire pressure of the each wheel with a tire pressure sensor (31) and transmits data of the detected tire pressure by radio waves; a receiving device (4a, 4b) including a receiving antenna (41a, 41b) that is provided at an outside of the vehicle to receive the data of the tire pressure transmitted from the sensor unit; and a control device (5) including a data acquisition unit (521) that acquires the data of the tire pressure received by the receiving device.