Nowadays, air pollution in cities has been proposed as a major problem .density of some pollutants in indoor spaces is much greater than the external spaces. In addition, communities are struggling with mental health problems like depression that is a part of human health.Plants act as biological filters and in addition to reducing carbon dioxide, moisture and reduce pollution in the interior they help the psychological aspects of human. Reduce anxiety, make the humans happy and avoid depression, especially in modern societies. The aim of this study was to investigate the effect of plants on the health and quality of interior environment.Indoor air may be polluted by lead, formaldehyde, fire barriers and radon. Plants can purify air from gases such as formaldehyde and benzene pollution of the air.An interesting point about the role of plants in mental health is that they are associated with nature and enjoying from their beauty is a simple way, but it's important to relax the soul and spirit of man by watching plants and their flowers.In this study, selected plants with respect to the items discussed was the rate: benzene, formaldehyde, trichlorethylene, xylene and toluene, ammonia, or a form of flowers and color variation were scored.The results showed that plants Spathiphyllum and Chrysanthemums were selected as the best plants for indoor use Gerbera aurantiaca, Mother-in-Law,s Tongue , Jacobinia carntaflamingo flower and Liriupe stood in the next rank.