the present invention discloses a rfid system for monitoring food hygiene , comprising : a first accommodating space ; an object - under - monitor with a rfid tag attached thereon , being disposed in the first accommodating space ; an environmental sensor , disposed in the first accommodating space ; a processor , electrically connected to the environmental sensor ; a first rfid accessing device , disposed in the first accommodating space while electrically connected to the processor ; a second accommodating space ; a displaying device , disposed in the second accommodating space ; and a second rfid accessing device , disposed in the second accommodating space while electrically connected to the displaying device .