The invention discloses an optimized signal communication system for RFID (radio frequency identification) labels in bottled liquid food production. An optimized processing module is arranged in a background computer, and according to the optimized processing module, a decrypted signal for requesting two-way transmission is stored by taking the name of a user as a filename according to the respectively corresponding users, and the signal is displayed to the computer to be checked by the user. Therefore, the problems that the subsequent signal processing burden is enlarged and the efficiency is low due to the random storage mode of the received signal because of the attached decryption operation are effectively solved.