Abstract: The image method of analyzing the interaction between a conductive sphere and a point charge is generalized to calculate the complex interaction between conductive sphere.The analysis on precision is given and the general way to deal with multiple spheres is illustrated.As an example of multiple spheres,the effect of a third conductive sphere on the two-sphere system is calculated and graphed.The physical picture behind the calculation is discussed briefly.

Key words: conductive spheres, electric image, precise calculation, physical pictures