In archaeology, rock art is human-made markings placed on natural surfaces, typically vertical stone surfaces. This art is found in many culturally diverse regions of the world. It has been produced in many contexts throughout human history. The oldest known rock art dates from the Upper Paleolithic period, found in Europe, Australia, Asia, and Africa. Petroglyphs or rock motifs have been one of the first human arts to express their emotions and perceptions of their surroundings. Study and analyses of these motives include the questions such as who have created these motives and in what ages? and what is the aim of drawing of this motive? In Iran, evidence of rock art can be seen in most mountainous areas where nomadic or herding life takes place. The collections of ancient lithographs of Kalsir, Sir Khordoo and Mohadava are located in the northeastern region of Iran, in the city of Torqabeh Shandiz. In this area, there are a large number of petroglyphs with various subjects, and the study of these works, considering their antiquity, can reveal the dark aspects of the life of the inhabitants of this area. In reviewing and analyzing these paintings, we are faced with questions of: What has been the living and environmental economy of this region based on the petroglyphs? How many categories can the drawings created on the rocks be classified? Since these motifs are related to livelihood, studying these motifs can reconstruct aspects of the life of the primitive inhabitants of this region. This field has a valuable rock art that has been related to each other due to the similarity of the designs. In this study, the rock motifs of "Shandiz Torqabeh Collection" have been studied to identify and address the causes and reasons for drawing rock motifs whereby content analysis and matching method have been used. The data of this research have been collected from the field survey method and library studies. The results of this study indicated that the motifs are in three groups: human, animal, and symbolic. These motifs originated from the ideas and environment in which they lived and the relatives of the creators of these motifs were nomadic pastoralists with these motifs being a reflection of their livelihood.