This course provides a practical knowledge of quantum electronics and advanced atomic physics for graduate students who are performing atomic and optical experiments. First, we provide a fairly conventional discussion of Gaussian beams, cavities, nonlinear optics and modulation techniques. Then we seriously discuss the knowledge of atomic structure and atom-photon interaction. Finally we connect them for the amplification of light and spectroscopy for the laser frequency stabilization. A number of very recent developments are discussed, such as frequency metrology using femtosecond lasers, laser cooling and trapping, and Ion traps.