This paper presents an elementary study on the Lozanov method-suggestopedia. Based on the theory of language teaching and learning, the paper analyses theoretically its basic principles and potential application in three aspects: linguistics, psychology, and the aims of instruction. The study indicates that in spite of the limitation in linguistic consideration and practical application, the method has its merit in psychological and neurological consideration which identifies the so-called suggestive factors used to tap the resources of the learner's brain to promote hypermnesia by reaching two complementary unities: the unity of the two halves of the human brain and the unity of the two halves of the consciousness.