This book is devoted to establishing a completely new concept within economics referred to as "trading economics" which is a reconstructed economic system in theory that seeks perfect harmony between micro and macro elements in a structured way, hence making the economic theory a rigorous system supported by internal logical continuity. Representing a revolution of the existing theoretical framework, trading economics has changed the logic of mainstream economics.  Specifically, it deduces the "macro whole" from the "micro individuals", and it introduces a systematic and comprehensive analysis approach. It stresses that within an interconnected world, the interaction between trading agents is the fundamental driving force behind the operation, development and evolution of the economic system.