The Tehran auction is one of the most important events related to Iran's art economy. In this research, in order to achieve a suitable and practical model for artists and art investors, the characteristics of the works and artists present in the 15th Tehran auction have been analyzed. This research is based on the purpose of the applied-practical type and the method is the descriptive-analytical type. By classifying the data, which included 72 works from 56 artists, ten main factors were investigated. These factors include the age of the artist, whether he is still alive, his signature, dimensions, shape, materials, context of the work, year of production and previous history of the work and its sale price based on the estimate of the auction organizers. The result is that the majority of the artists of the Tehran auction are veterans, and out of 56 artists, only 29 are alive and 27 have died. According to the statistics, 39 of the 72 works have had a brilliant previous history. The ideal dimensions of the works are 50 to 200 cm, and the predominant work field is fabric and rectangular canvases. The works of oil paint and mixed materials are the most numerous, and the works of multi-layers are limited. Also, all the works have signatures and 78% of the works were sold within the estimated price range from the Tehran auction and the remaining 22% of them were sold above the estimated auction price.