Abstract: The construal of Functional Linguistics Theory is orientated to its semantics, as an abstract meaing between pheonomenon and metapheonomenon, "Fact" projection is significant to the functional semantic research. This paper mainly concerns about sorting out different kinds of "Fact" syntactics, focusing on its semantics. Firstly, this paper distinguishes "Fact" projection from other types of projections; Secondly, the syntactic features of "Fact" projection are illustrated in terms of transitivity process, speech function and metafunctons, meanwhile, the interpretation of fuentional meaning of the "Fact" projection combined with grammar metaphor is given as well; Finally, this paper attempts to construct a "Fact" projection system with clear classfications and semantics, in the hope of gaining a more comprehensive and deeper insight into the "Fact" syntaetics and semantics.