Publish the hydrological warning information is not only the responsbility of hydrological departments, but also an important embodiment of the public welfare undertaking. The hydrological warning information provide technical support for flood control and drought relief, which also improve the public consciousness on disaster prevention and mitigation. In order to release the hydrological warning information timely, the National Hydrological Warning Public Service System was established to centralize and public the information, which contains subscription services and makes the warning information influence more widely.