In recent years, since the number of users watching video over the Internet has grown rapidly, the broadcasting system that reduce server load have attracted attention. In broadcasting delivery, the server can reduce its processing load by dividing the same video data among multiple clients at a fixed bandwidth. The client have to wait between requesting to receive data and starting to play it back. To reduce this waiting time, division-based broadcasting has been proposed. In this approach, since the server repeatedly broadcasts the video data in multiple segments, the clients are more likely to receive the first segment. The division-based broadcasting system developed by our research group can implement scheduling methods that reduce this waiting time. However, when the server changes the qualities of multiple videos during playback with MPEG-DASH, the conventional system synchronously cannot deliver them to clients. Switching video quality during playback significantly increases waiting times for clients. In this paper, we propose a division-based broadcasting system that delivers videos of multiple qualities synchronously. Our system can reduce waiting times for changing video quality by improving the delivery process on the server side and the reception process on the client side.