Given that television is one of the most influential media that uses written language in various TV programs, like advertisements and subtitles, it can be considered as one of the best tools for expanding and teaching the orthography approved by Persian Academy of Language and Literature. In this regard, the present study addresses the representation of Persian orthography in the national media and its compliance with the guidelines approved by the Academy. In this research, an extension of TOPSIS method has been used in the framework of Multiple Attribute Decision Making. To this aim, orthographic content of seven IRIB TV channels namely, One, Two, Three, Four, iFilm, Tamasha and News were analyzed. Then, the compliance rate of each was verified by the “Guidelines on Persian Orthography” approved by the Academy and the channels were ranked by linear assessment method. Findings indicate that none of the seven channels are fully compliant with the guidelines.