The book is a compiled volume on what the Chinese and foreign scholars have revealed about Capital through their research. Starting from the broad understanding of Marx's technical thoughts, the publication offers a systemic account into Capital and its manuscripts. Inspired by Marx's expositions of many specific technical phenomena, the author of the book tries to dig up and extract the technical ideas that hide behind thereof, in an attempt to shed some light on how Marx's technical thoughts have formed and evolved. At the same time, he taps deep into and explores the theory about elementary technology in the vision of Marx, and sums up the fundamental principles and logical structure of Marx's technical ideas, as a means to sketch out the outline of Marx's technical ideas.