The invention relates to the field of auto electronic technology and particularly relates to an ID matching method for auto tire pressure monitoring system and a system thereof. A low-frequency handheld-triggering apparatus sequentially acquires tire IDs transmitted by tire sensors in a given order, and sends the tire IDs to a controller for registration. The tire sensors transmit information of tire IDs, tire pressure and tire temperature to the controller. The controller compares the tire IDs transmitted by the tire sensors with registered tire IDs, wherein if the tire IDs are correct, the value of the tire pressure and the value of tire temperature are displayed. The low-frequency handheld-triggering apparatus is small in size and convenient to operate. In the way that the tire IDs are transmitted to the controller for registration by the apparatus, online registration in a factory is achieved and users register at home. When the low-frequency handheld-triggering apparatus acquires the tire IDs, every new tire ID is compared to the previous tire ID, accordingly multiple registration of the tire ID is avoided. The controller compares the tire IDs transmitted by the tire sensors with the registered tire IDs, accordingly a registration error is avoided.