In this paper the fitted formulas given by Edlen and Matsushima are anlysed theoretically. A reasonable fitted formula is synthesized and proposed. By using this new fitted formula, we have predicted energy levels of Br V ion for 4s24p, 4s4p2, 4p3, 4s24d and 4s25s configurations, and calculated wavelengths in these configuration's transition. The fitted energy levels are well agreement with the results observed.