In the present paper the atomic and electron transport property of Na-Pb zintl alloy have been studied employing Harrisons first principle pseudopotential technique. The thermodynamical properties have also been calculated on the basis of compound formation employing Bhatia-Hargrove technique near the melting point. These techniques has been used to compute the thermodynamical mixing properties, partial and total structure factor, concentration concentration fluctuation at long wavelength limit SCC(0) and chemical short range order parameter (CSRO) of the alloy. The results are in good agreement with experiment. Useful information has been interpreted regarding the nature of this alloy.