A useful transformation which interrelates a large class of non relativistic Schroedinger equation is to be obtained. It is possible to obtain the ground state of non relativistic Schroedinger equations. The exact solutions may be used to act the accuracy and the reliability of numerical methods of solving Schroedinger equation. In these transformations, for a class of potentials, Schroedinger equations are interrelated. Such an interrelation is useful for finding exact solution of these Schroedinger equations.