Abstract: This article is the second section of a series of articles on Foreign Language Learning Information Processing in Bilingual Dual-double Structure Theory. The author believes that foreign language learning information processing will be divided into initial, subsequent and advanced three phases, and in each phase the transmissions and manners of the information input, processing and storage are different; and explicitly points out that 1)foreign language learning information processing has distinct features in the initial processing and the secondary processing; 2)and after the acquisition of the mother language, the UG System in the hibernation State would be restarted by the functions of the neural network and its related functional systems during the transition process in the foreign language learning from the subsequent phase towards the advanced phase, and generate Foreign Language-Thinking Structure System; and this structure system and Foreign Language Knowledge-Cognitive Structure System would carry out the joint participation in the information processing and constitute a special psychological mechanism in the foreign language learning information processing.