Philosophers and linguists domestic and abroad have been debating over the relationship between sound and meaning of the language sign.

However, the final realization of histrionic discourse construction should rely on the switchs between images and language signs.

They think that there are two basic principles in the tone and meaning combined of language sign: arbitraire and motivated that have compromise and supplement each other.

Observing linguistic symbols from the surface level of cognition,one could find that cognition of linguistic symbols can be either rational or irrational.

Guided by the principles of cognitive linguistics, the paper attempts to examine the cognitive basis that provided key links for establishment of linguistic symbols and linguistic symbol systems.

This paper expounds the important functions of using correctly the symbol language and body language on improving the service attitude and service quality of the librarians.

Point out the problems existing in the sci tech article and discussed the certainty and importance of developing and using the symbol language.

Point out the problems existing in the sci-tech article and discussed the relation between symbol language and international standard and development the certainty and importance of the symbol language.