This paper studies the task of extracting moving object from static irrelevant background. The implementation is prepared for the purpose of real time application. Some image processing concepts related to this study are first presented and improvement is proposed. We have obtained motion mask by applying background subtraction and consecutive frame differencing. We also propose a reliable background update and noise reduction operator to facilitate the result of moving object extraction. The analysis and result are obtained by using Matlab Image Processing Toolbox Version 6.01.