Science and technology innovation ability, independent innovation ability in particular, is the crucial factor of national core competence. Implement forward engineering, improve independence R&D ability with self-innovation are important approaches to enhance independence innovation ability, and so as to implement reverse engineering with imitating innovation. Reverse engineering stratagem are not only implementing reverse engineering, but also establishing in the complex stratagem of reverse and forward engineering on the basis of technology obtaining ability, especially focusing on the innovation of acquired technology. Reverse engineering promoting forward engineering and forward engineering driving reverse engineering are keystones of reverse engineering implementation, and also the practical choice for China to enhance independence innovation ability.