This manuscript is a study of Jiyun Guwen. As a research result, Jiyun has total 1,282 characters which came from Shuowen Guwen, Shuowen Zhushi, Shuowen Xiaozhuan, Shuowen Zhouwen, Shuowen Huoti. In addition, I found that some parts of Guijinzigu, Santishijing, Yupian, Hanjian, Guwensishengyun and Lishu matched with Guwen. Jiyun also followed the previous case which Jiyun Guwen came from Tongjiazi, Tongjiazi Guwen, Leiyizi and Leiyizi Guwen. I can assumed that Jiyun collected huge amount of Guwen from old books through the study of origin of Jiyun Guwen. In spite of study of origin of Guwen, I found 102 origin unsured characters. I can say missing of original books is why it is important reasons. I can conclude that 30 characters among 102 origin unsured characters were made by Guwen Goujian characters which has same Jiyun. Shuowen Guwen before Jiyun is Bizhongshu characters. Jiyun covers all contents of previous Guwen includes Shuowen Guwen. The meaning of Guwen has been changed from Shuowen to Jiyun. It tell us that the meaning of Guwen expended from Shuowen to Jiyun. Basis of an argument, Jiyun stretch the meaning Guwen to the character of ancient books or the old text.