Abstarct: The magnetic method is the oldest branch of geophysical science and widely used to detect subsurface features. The data processing is essential for analyzing and interpreting the magnetic data, modelling and correct exploration of mineral prospect areas. Some of the elements isotopes are unstable and become stable core with the release of active ion radiation. These isotopes, are called radioactive isotopes or radioisotopes. Radiometric method is according to measurement of gamma-ray energy during the decay radioactive isotopes of Potassium, Uranium and Thorium. The purpose of this project is investigating the magnetic anomalies of Robaei region, exploration of the anomalies resulting from radioactive elements in regional scale and comparative estimate of these elements in surface rocks and studying of mineral potential of the area. Airborne magnetic and radiometric data has received from the Geological Survey of Iran (GSI), the Robaei region that is located in Semnan province. Processing of aeromagnetic data is done according to Australian Geological Survey Organization (AGSO). Generally, the aeromagnetic processing consists of six parts that are respectively as follow: 1- Diurnal correction, 2- Lagging correction, 3- Heading correction, 4- IGRF, 5- Levelling and 6- Micro Levelling. To analysis and interpretation of magnetic intensity maps, are applied some filters, as follows: RTP, upward continuous, derivative in Z-direction, derivative in X or Y-direction, analytic signal and Tilt Derivative. To study and determine the survey area, data were modeled with Mag3D software, that was chosen Robaei’s iron ore deposit and anomaly mass was studied comparative position in the survey area. Processing of radioactive data is done during six steps, that are respectively as follow: 1- Dead time correction, 2- Cosmic & aircraft background correction, 3- Radon correction, 4- Stripping ratio correction, 5- Altitude attenuation and 6- measuring system sensitivity. After data processing, maps of, concentration of radioactive elements and the Ternary map are achieved. According to comparing the results of two mentioned methods, it can be said: In the center and west of region, because of intrusive mass, magnetic intensity is high. After checking the area, it was identified there was iron ore mine in this place and also the concentration of radioactive elements are low. According to the low magnetic intensity in the north and east region and high concentration of radioactive elements in mextamorphic rocks, there is the high possibility of the existence of mextamorphic rocks. In the north, east and southeast of area, that concentration of Thorium and Uranium is high, there is possibility of the presence of copper minerals. Absolute and comparative concentration of radioactive elements will be changed significantly with lithology and on the other hand the different types of rocks can have a similar radiometric symptoms.