Thermodynamics is a subject that investigate the relationship among macroscopic observables; while statistical mechanics . In the first part of this course, we will review quickly the basic thermodynamics and then move to the ensemble theory of statistical thermodynamics. With these, we will then talk about applications of the basic principles to ideal gases, classical and quantum, and solids. In the second part of this course, other topics such as Monte-Carlo simulation, renormalization group, classical simple liquids and non-equilibrium phenomenon will be addressed.