A radio frequency identification system comprising: a measuring assembly configured to measure a physical quantity of an object to output a first data associated with the object, a loop antenna configured to be attached to the object, wherein the loop antenna has an IC chip storing a second data associated with the object, a radiation pattern disposed at the measuring assembly and a transreceiver in signal-transmittable connection to the measuring assembly, with the transreceiver configured to perform at least one of sending the first data and receiving the second data when the loop antenna and the radiation pattern are electromagnetically coupled to each other, wherein the IC chip stores the first data when the transreceiver sends the first data, and the measuring assembly receives the second data and outputs a message having the first data and the second data when the transreceiver receives the second data.