Abstarct: Geophysical methods are one of the indirect exploration methods which are widely used for exploration of sub-surface resources. One of these methods is the magnetic method, which is much common in use because of the speed and cost of exploration of iron ore resources. Generally, processing and analysis of magnetic data will be carried out through different ways. In this research, three methods of the analytical signal, the Euler and the Normalized Full Gradient (NFG) are used to estimate the depth of magnetic anomalies. These methods have been applied to the synthetic datasets as well as actual magnetic data existed in the Tang-e-Hanar mineral region. Tang-e-Hanar iron ore deposit is located at a distance of 240 km far away from the south of Birjand city and also 35 km away regarding the south of Qaleh Zari mine. In this area, about 6300 magnetic stations are measured on 120 profiles in the north-south direction. After applying diurnal and IGRF modifications of the ground reference field on the data, the map of total magnetic field anomalies was prepared. After applying processing methods such as the Reduce to magnetic pole (RTP), Residual, Analytical signal, Pseudo gravity and Upward continuation the number of 8 anomalies, the area was distinguished. In order to estimate the depth of placement of the determined anomalies, three profiles namely A, B and C were applied to the anomalies and the three mentioned methods in above were applied to this data. The results show that the main anomaly of the area, the anomaly A, extends to the depth of 300 meters and this can be verified in qualitative methods in interpreting magnetic data. According to the Euler's method, the analytical signal and the NFG as well as the semi-Automate qualitative methods in interpreting magnetic data, the depth of the upper surface on top of the three profiles A, B and C were measured as 80-100, 90-110 and 50-70 meters respectively.