A calculation method of Judd Ofelt parameter and hence the fluoresence life time, fluoresence branching ratio and averaged emission cross section by the absorption spectral measurements in three perpendicular directions and the results for biaxial crystal Nd 3+ :KGd(WO 4) 2 are presented. The fluorescence life time was calculated as 119 μs and the averaged emission cross section as 2.3×10 -19 cm 2.