A vehicular tire pressure device integrates a central monitor and signal match device of a conventional tire pressure monitoring system. The vehicular device is also combined with a power-getting interface physically. The vehicular device is also provided with a separate battery which may be rechargeable and be charged by the interface. The monitoring system and vehicular tire pressure device may be used more easily and is convenient in installation and testing and therefore, they may be accepted more easily by the user and get great commercial success.