ARPES (Angle-Resolved Photoelectron Spectroscopy), and LEED (Low Energy Electron Diffraction) can be realized as significant surface science techniques which provide insights into the fundamental properties of materials and their behavior at the atomic and electronic scales. ARPES can be recognized as an electronic structure characterization technique, whereas LEED is a structural characterization technique. In this experiment, we studied these two techniques with selected materials (Au and InSe) and achieved insightful and interesting observations and results.