In this article, partial slip flow and heat transfer of non - Newtonian fluid due to rotating porous disk is investigated. The Governing equations are solved numerically by using Runge - Kutta method of fifth order. The velocity and temperature profile is computed. The numerical calculations for wall roughness parameter ( and ), Reiner - Rivlin fluid parameter (K) are also estimated. The effect of various non - dimensional parameter wall roughness ( and ) in Newtonian and non - Newtonian fluid, Reiner - Rivlin fluid (K), Prandtl number(Pr), thermal slip ( ) on velocity and temperature profile are analyzed through graphs.