In the paper an intelligent speech production system is established by using language information processing technology. The concept of bi-directional grammar is proposed in Chinese language information processing and a corresponding Chinese characteristic network is completed. Correct text can be generated through grammar parsing and some additional rules. According to the generated text the system generates speech which has good quality in naturalness and intelligibility using Chinese Text-to-Speech Conversion System. The concept of bi-directional grammar is proposed in Chinese language information processing and a corresponding Chinese characteristic network is completed. Correct text can be generated through grammar parsing and some additional rules. According to the generated text the system generates speech which has good quality in naturalness and intelligibility using Chinese Text-to-Speech Conversion System.