A communication support method system to ease make selection of a virtual space in a chat system. Category DB 22, which accumulates URLs and URL categories, is prepared. A URL said in a channel, its category, and the channel name are written to a URL table. The total sum of categories of URLs said in a channel becomes the channel characteristics. Channel characteristics are displayed in a window, etc. at an IRC client. After finding the total sum of URL categories, the weighting of URLs that conform to the chat contents should be immediately increased so that the channel characteristics better reflect the chat contents. For example, this includes increasing the weighting of URLs said by users who spend a long time in the channel or users who are active in sending messages. This also includes increasing the weighting of URLs which result in active chatting after the URL is said.