Radio frequency tag tester

A radio frequency (RF) tag tester is used in a process for testing at least one RF tag. The RF tag tester includes a testing electric-wave generator for generating an electric-wave signal for testing purpose; a hollow conduit for receiving the electric wave from a first terminal; a trench hole arranged on the wall of the hollow conduit for allowing the RF tag to be tested to enter the hollow conduit inwardly therethrough, wherein the testing electric-wave signal having interacted with the RF tag is then transmitted out from a second terminal of the hollow conduit; a detector for detecting the testing electric-wave signal having interacted with the RF tag and transmitted from the second terminal of the hollow conduit; and a signal processor in communication with the testing electric-wave generator and the detector for operating and realizing an RF electric feature of the tested RF tag according to the difference between the testing electric-wave signal and the testing electric-wave signal having interacted with the RF tag.