Although, intangible assets play an important role in firm's success and its final value in the new knowledge based economy. There is fundamental challenges about valuation of knowledge assets and intangible value drivers and also assessment of its effect on firms success and performance . because according to current accounting standards, most of the intangible investments cannot report in the balance sheet. This research is aimed to modeling of intangible assets in the firms listed in Tehran

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... tock Exchange. For the purposes of the research, first to identify intangible assets aspects and financial measures of firms investments in each of aspects, concept of mapping was presented. Then by two proposed models, value of intangible assets for 143 firms from 1385 to 1392 was assessed. Finally from these two models, the more effective model was determined. According to the research findings, the proposed models have enough validity.