As we move into the 21st century, nurses are facing the challenge of contributing to the health care of a society with an increasing proportion of ageing persons This group of people become more heterogeneous as they age, bringing with them an extended life history of experiences of wellness and illness They have been faced with numerous stressors and losses and have made successful or unsuccessful adaptation to those life experiences One of the disconcerting stressors of the elderly is the promotion and maintenance of mental health In this paper we will examine the application of the Neuman System Model to the mental health nursing of older adults