In this paper we explore the method based on keywords to analyze the questions for Confucius Analects Knowledge System. After analyzing the questions we can find the answers from the knowledge database of Confucius Analects. Confucius Analects Knowledge System is regard as a specific domain Question-Answer system. Taking a reference to the chapters' structure of Confucius Analects and the literature on Confucius Analects the chapters are classified into 8 categories. One of questions analysis' work is deciding the categories of questions. We use How Net to get all meanings of keywords then select congruent meanings for each category. Questions' categories depend on the keywords. All the questions collected are clustered by k-medoids algorithm. We find some rules from the clusters so that all the questions are classified into several types. The other work of questions analysis' is deciding the questions' types. Then we can find answers from the knowledge base.