Abstract: In this paper we have established the ISO (3, 1|N),OS_p(N|4) and SU(2,2|N) <N'> supergravities, attempted a possible quantization and renormalization scheme of the ISO(3,1|N) supergravity. The embeddingof SU(5) grand unified theory in the SU(2,2|N) <N'> superunified theory is given and the method of particle multiplets in the supergravities is discussed.