The main aim of this work is to keep the interacting liquid level and temperature parameter at the desired value. This article presents Kravari's algorithm, Generic Model Control (GMC) and Hischorn's algorithms for an approximated model of interacting level and temperature process. The comparison of the above algorithms are shown. The control laws obtained from the above algorithms are relatively simple and accurate. These algorithms make the closed loop system linear in an input-output sense. Control performance of Hirschorn's is found to be better. The control laws obtained for Hirschorn's algorithm gives improved Settling Time (Ts) and Integral Square Error (ISE). A two input two output MIMO has been considered and the system was thoroughly analyzed for various decoupling and linearization algorithm. ©2012 SICE.