Abstract: This paper shows the work of applying the theory of Augment Transition Network(ATN)to syntax analysis.It is only a part of Chinese language understanding and its man-machine language interface.The syntax analysis of the Chinese language is an interactive procedure.The computer programs make up the Question-Answer System in the energy management world. The syntax processor adopts one time scan,calls the syntax and scans the status matrix in terms of current status & word features,and then decides whether the status is changed and where it goes to.It starts semantical interpreter to complete the syntax analysis,objective generation and other necessary actions progressively.The system is implemented in BASIC and run on the TI 990/12 minicomputer.It uses a dictionary including the large major words of energy management operation language.Simple Chinese declarative sentences,interrogative sentences and imperative sentences have been tested on the machine and ideal results achieved.