The signifier in scientific language corresponds directly and definitely to the signified,but that is not the case in literary language where the signifier and the signified are independent of each other.

Based on design theory and practical cases,this paper analyses the relationship between signifier and signified of symbols,pointing out the properties including rigid regulation,arbitrariness,stability and unity.

The title of Russian literatures is a complex literature symbol combined by both the superficial significance (signifier) and the literary significance (signified).