In this chapter, I attempt to offer a general background of experimental econophysics, the theme of the book. For this purpose, I start by answering some fundamental questions. That is, why does physics need economics or finance, and vice versa? What are physical ideas or methods? Then, I introduce both the birth of econophysics and the two branches of econophysics (namely, empirical econophysics and experimental econophysics). Finally, I present the methodology of experimental econophysics.