Switched reluctance drive (SRD) system has been used in many applications. However, because of its inherent nonlinearity, the design and analysis of SRD system is relatively difficult. In this paper, the development of design and analysis tool for SRD system based on MATLAB/GUIDE is studied. Firstly, the steps for the development of graphical user interface (GUI) by MATLAB/GUIDE are summarized. Then, two tools, namely switched reluctance machine (SRM) design tool and converter thermal analysis tool , are presented as examples. The theoretical basis, structure and functions of both tools are presented. Results from each tool are given as well.