Environmental analysis study as an important factor in strategic planning includes monitoring assessment and dissemination of information related to internal and external environment of organization. The analysis of this industry is very essential according to increasing development of software technology in iran. In order to achieve this goal after studying various models the PEST model have been used to analyses the effecting factors on software industry in iran. In this article on the basis of this model appropriate political social economical and technological factors was identified and studied. The results of which have been presented. Show existing opportunities and threats of this industry that could be used as a basis for the future planning.