A delivery order relaying system is disclosed. The system comprises: an order receiving module for receiving a delivery order, to be processed, which is transmitted from an orderer terminal; a TTS module for generating, through TTS, a voice delivery order corresponding to the delivery order to be processed; a voice output module for connecting a phone call to a vendor corresponding to the delivery order to be processed, and outputting the voice delivery order through the connected phone call; a response receiving module for receiving, from the vendor through the phone call, an order response to the delivery order to be processed; and a delivery order response module for transmitting order processing result information, corresponding to the order response, to the orderer terminal having transmitted the delivery order to be processed.