Electrical discharge machining (EDM) is a highly regarded method for producing ultra-Precise mechanical parts. It generally used for all type of electrically conductive materials to create deep holes, cavity and complex geometrical shape and sizes. EDM used for machining turbine components, Engines, Transmission System for automotive industries and mould creation for plastic and rubber industries. EDM process is based on thermoelectric energy between workpiece and electrode. Material removal occurs with spark between the workpiece and electrode through melting and vapourizing. The tool electrode and workpiece are deep under dielectric fluid like kerosene, deionized water and other fluids. The main purpose of this study is to explore the information about electrical discharge machining of molybdenum material using different tools and techniques for optimum result of the experiments. This paper reviews the effect of EDM parameters like peak current, pulse on time and gap voltage for molybdenum machining with flat surface electrode of copper and brass. Output response parameters such as material removal rate (MRR), surface roughness (Ra), Tool wear rate (TWR) analyse after the experiment.