Abstract: In Functional Linguistics, projection is the logical-semantic relationship whereby a clause comes to function as "a representation of a linguistic representation". Projecting signal marks the information sources. Different projection types are made by the various combination of projecting signal and projected information. The study explores the unstable factors in the process of projection translation, which usually displays changes of projection types, transposition and omission of projecting signals. It shows that the choice made in the target language is based on the communicative intention and the characteristics of its projection language.