"Green's Function in Condensed Matter Physics" introduces in detail the basic theories of the commonly-used monomer and multi-body Green function in condensed matter physics. It introduces the Feynman graphic technique and equation of motion method regarding multi-body Green function, mainly in the aspect of weak coupling superconductor, Heisenberg magnetic system and mesoscopic transport. The book also explains the concepts and deduces the formulas in great details. It is very learner-friendly with its content level going gradually from being easy to being difficult.