Abstract: During the text-constructing process, subjectivisation is applied to show that the speaker consciously controls the flow of information.As a form of subjectivisation, the thematic element indicates various departing points of the information, displaying the speaker-oriented construction of the textual information.The speaker, based on the self-referent "I" subjectivisation, can construct the expressing system to imply the self-existence.With "I" as the thematic element or the reference point, the speaker can initiate the discursive information in which the speaker conveys his idea of, attitude towards and/or evaluation of the consequent proposition.At the thematic position subjectivisation can help to mark experience subjectivity, interpersonal subjectivity and/or textual subjectivity, and distinguish the meta-function of the thematic information.The speaker can manipulate subjectively the information foregrounded as the thematic one, which displays the speaker's consciousness and ability of constructing the ego.