When Considering The Gas Or Oil Pipeline Industries, The Major Unaccounted Losses Is Due To Leakages In The Pipeline. As The Time Interval Of Finding The Leak Increases The Loss For The Company Increases. Unfortunately, Most State-of-the-art Leak Detection Systems Have Limited Applicability, Are Neither Reliable Nor Robust, While Others Depend On The User Experience. This Project Work Consists Of Developing An ‘autonomous Leak Detecting Robot’ That Move Inside A Pipeline And Find The Position Of Leakage. The Need Of A Leak Detecting System, Types Of Leak Detecting System Are Discussed In Brief. Leak Detection Is Done Using The Principle Of Pressure Difference Around The Leakage Area.