Radarsat is the most advanced satellite SAR system now. It has varied beam modes and offers the different type of remote sensing data products. Prior to the selection of suitable data products, the related influencing factors should be considered carefully. Focus on the interpretations of geological structure and lithology, this paper discusses and analyses the main influencing factors about data choice to the field of geological exploration as following: beam mode, Look anagle (beam position), acquisition time of the data, satellite's orbit and the level of data handling. Then proposing recommendations of the data products selection to the field of geological exploration were recommended, it is helpful to the geologicl survey by Radarsat SAR data Products.