The present study aimed at using Using fuzzy Analytic Network Process (FANP) In a SWOT Analysis. On the other hand, In this research we tried to use of strengths, weaknesses, opportunities and threats (SWOT) analysis which is one of the most famous table technique in strategic planning process in identify strategic factors of organization and by discovering and identifying those factors, the organization can be build strategies that in SWOT are referred to as SO, ST, WO and WT strategies. According to internal dependencies existed in most parts of strategic planning, therefore it was necessary to employ a technique which allowed us to measure its dependencies. In many of decision problems was desirable that relations among factors could be imagin as like as reality word. The ANP powerful instrument with fuzzy phase got to allow modeling SWOT analysis to planners organization. This research was done in 2011, in Notash Afra Co. which works in the field of installation of water and energy projects in Tehran. The present research in terms of purpose was an applied research; it was also considered as a descriptive research. In this research for determining importance weight, fuzzy analytic network process was used. The used fuzzy method was Chang’s extent analysis method (EA). Excel software had been used in calculations for analytic network process through using extent analysis method for determination of importance weights and MATLAB software had been used for reaching final results. Research results showed that when dependence exists among SWOT factors, this dependence could change weight and priority of strategy alternative and eventually WO strategy with the final weight of 0.317 was selected as the best strategy.