To achieve an advertisement delivery system to mass retailers capable of automatically delivering advertising contents to be displayed on the mass retailer side from an advertisement management company side without the aid of much man power and easily checking the results of the actual display of the advertising contents on the advertisement management company side.

The advertisement delivery system includes a master server 1 which manages and transmits advertisement data, a client server 3 which receives and stores the transmitted advertising data, one or a plurality of terminal devices 6a to 6n for advertisement output which are controlled by the client server 3 to output and display the advertising data stored by the client server 3 and a network 2 which delivers the advertising data from the master server 1 to the client server 3. Further, the client server 3 in the advertisement delivery system has a return means which confirms the output condition of the advertising data in the terminal devices 6a to 6n for advertisement output and returns the results of the check to the master server 1 through the network 2.