Abstract: The relations between identifying processes and other processes types in the typological perspective in SFL are presented in the examination of the intermediate cases on the identifying processes – attributive processes cline, identifying processes – material processes cline and identifying processes – verbal processes cline. The intermediate cases on the three clines are influenced by the definiteness of the second participant, the equativeness and tense of the process and the consciousness of the first participant respectively. And the relations between identifying processes and mental processes and existential processes are introduced briefly as well. Taking a topological perspective will make explicit the relevance between identifying processes and other processes types so as to establish a comparatively comprehensive system of identifying processes and deepen the understanding of the transitivity system. In addition, typological perspective and topological perspective as complementary perspectives can show a complete picture of the characteristics of a language phenomenon.