To study the impacts of weather processes on various diseases, a diseases investigation in two community hospitals were conducted in combination with eight different weather processes in 2002 and 2003. Results indicate that cold and fogy weather events have the greatest influence on human health;for the human group of sixty or over, the influence of weather, such as cold, severe convective, muggy and heavy snowing weather, is greater on men than on women;the elderly people of sixty or over is the most sensitive group to special weather. It is concluded that cardiovascular patients should be very careful in heavy fogy, muggy and cold weather, and hypertension patients should pay attention to low-pressure weather, especially in snowy days in winter.