In the past, people followed the rules or policies by the law or direct administration orders, yet the government should consider how to utilize various ways of communication or channels which people can be easy to understand what these official policies are, and then to achieve the objectives of public propaganda and education in this democratic society nowadays. By doing that, all citizens can not only endeavor to work together with the government but also carry out the future policy purposes. Yunlin County is one of the important agricultural production regions in Taiwan where the irrigated area is up to 123,000 hectares and agricultural water consumption reaches approximate 90 percents of all available water resources in the Choshui River Basin. Moreover, since there is no sufficient surface water supplied, groundwater becomes an another vital resource for every water consumption targets. However, over-extracting groundwater leads to land subsidence which is a permanent damage for our environment. In the recent years, subsidence rate is getting slowing down in Yunlin County, but it is still one of the serious areas of land subsidence in Taiwan, with the maximum subsidence areas and average annual rate of subsidence. After analysis of data from hydrology, physical geography, industries, human culture, land utilization, supply and demand for water resources and land subsidence development, the main problems of land subsidence are listed in the following. 1. Water demand for industries exceeds potential water supply, hence the supplement of water is gradually provided by groundwater. 2. Illegal pumping groundwater becomes widespread and it is quite difficult to punish and control properly. 3. With the aging of employment population, it is not an easy task to counsel and assist in changing their careers. 4. Much concern about further land subsidence due to over-pumping groundwater from deep aquifers continuously. 5. Less achievement of land subsidence prevention has been reached due to lack of manpower and financial budgets. This study will focus on discussing how to integrate public policy with propaganda, knowing which roles volunteers play in policy execution and increasing success rate of policy enforcement through analyzing the past history of water conservancy, orientation, operation system and current management of all relevant water resource volunteer organizations (Yunlin Land Subsidence Prevention Volunteer Service Team is the major example).