The number of people on Earth, where they live, and how they live all affect the condition of the environment. Changes in environmental conditions, in turn, can affect human health and well-being. Human demographic dynamics, such as the size, growth, distribution, age composition, and migration of populations, are among the many factors that can lead to environmental change. The precise impact of a given change depends on the interplay among all these factors, but it is clear that demographic change can affect the environment.HIV/AIDS is one of those diseases which can change on demographic pattern as well as can change various types of Environment. Approximately 39.5 million people around the world were living with HIV/AIDS in 2006. Of these, almost two thirds were in sub-Saharan Africa. The same year, an estimated 2.9 million AIDS-related deaths occurred globally. The number of people living with HIV continues to rise around the world especially in Africa, parts of Eastern Europe, the Caribbean, and South, Southeast, Central and East Asia, with prime age adults being affected most (UNAIDS 2006a). HIV/AIDS has rapidly become one of the major problems, particularly in poor countries. It is shown that it is primarily increasing difficulties in making sustainable use of natural resources when time, energy and money must be used to relieve the effects of ill health and when labour is tragically lost. At the same time various forms of environmental degradation affect the general health status of people and increase their vulnerability. When HIV/AIDS is added to the list, there is a danger that people cannot make a living any more.