A processing liquid supply system includes: a processing liquid supply apparatus including a first carrier accommodation section that accommodates a carrier, a first bottle accommodation section that accommodates a processing liquid bottle taken out from the carrier, a liquid feeding section that feeds a processing liquid to a substrate processing apparatus from the processing liquid bottle, and a first transfer arm; and a control device configured to control the first transfer arm to take a processing liquid bottle out from the carrier and transfer the processing liquid bottle to the first bottle accommodation section, to transfer the processing liquid bottle from the first bottle accommodation section to the liquid feeding section, and to transfer the consumed processing liquid bottle from the liquid feeding arm and accommodate the consumed processing liquid bottle in the carrier.