This paper provides a system called AirSpace which can deliver multimedia contents of advertisement to users over the Internet. Advertising their products or services is vitally important to companies providing them. From the user s point of view, it becomes popular to get advertisement information from the Internet. We can find a number of advertisements over the Internet such as google adwards, amazon web service and mail magazines. In addition, multimedia contents such as sounds and movies become popular and start to be used for advertisement. However, it costs quite a lot to deliver these contents to a large number of end users because multimedia contents require quite a lot resource such as hardware of the servers and network bandwidth.