The potential for climbing robots that can work in severely dangerous conditions is immense. Magnetic Crawling Robot (MCR) is magnetic adhesive type wall-climbing robots, which climbs metals of various heights. MCR can be used in cleaning the heavy metal structures, as a carrier to move various items and monitoring the sections. The design of MCR will change depending on the load it carries. The objective of this paper is to present a generalized design methodology, which can be implemented for designing different sizes of MCR and to present a study on the effect of magnetic field strength and magnet’s position on the performance. This work identifies different components and calculates the size and shape of the magnets for different load carrying conditions. Based on the load, the sizes of the magnets are calculated using a user-interface program developed in MATLAB.