The Han river basin environment is gradually getting worse by increasing pollution loading due to over-crowding, industrial development. This research was to try to estimate pollution load, analyze the quality of water condition and predict the water quality in the year of 2006 and 2011 for management of Han river. Han river has more higher occurrence pollution load by population than occurrence pollution load of land and domestic because of be situation in residing narrowness quaters. Most of drainage flow out passed by the treatment plants of Tan-cheon, Jung-rang and Seo-Nam. According to the research data, the advanced wastewater treatment process and extension of establishment of more wastewater treatment plant are required in order to reach the requirement of the level of maintaining water quality of Han river.