Abstract: This paper is based on Automatic Speed Control of Single Phase Induction motor with variation of ambient temperature. The circuitry of the system comprises of temperature detector, control circuit and loading circuit. The control circuit is embedded with comparators, amplifiers and relays. Here algorithm, flowchart and computational approach is initiated. The detailed circuit diagram is given. This system has undergone a successful test approach and its behavior is observed by analyzing its temperature versus load curve. The equation of the curve using Newton’s Interpolation method is incorporated. Simulation approach is incorporated.