An important topic in plasma equilibrium study [1] and control in a tokamak is to find out and reconstruct the magnetic iso-flux surfaces by using plasma boundary condition. This can be done by using the multi-polar moments method which results from the homogeneous solution of the Grad-Shafranov equation. The equilibrium code ODIN [2] is based on the above described technique and is used to reconstruct the magnetic flux and the equilibrium in the Frascati Tokamak Upgrade (FTU) experiment. The real-time reconstruction of the magnetic field map is important to compute quantities necessary to control the plasma. In this paper we discuss the real-time implementation of ODIN in an RTAI virtual machine and as a result of the real-time implementation, we will show the time evolution of the reconstructed magnetic iso-flux surfaces.