Community on netowork-BBS, ML-, there are useing text while people communicate. Members of a BBS have to imagine a community's activity by the text. Our subject of stydy is interaction on community. There are included activity of the community, content of their talk and relation with each participats. On this development, visualization of the state of community's activity is our purpose. We visualized these;(i)icon's movement of a location on screen : comparison of other icons.(ii)icon's motion : variable of icon's quantity. (iii)icon's cloma : variable of icon's quality. (iv)icon's brightness : variable of icon's quality.