The seventh year in Yong Le of the Ming Dynasty,Mazu and the God of Nanhai were conferred almost at the same time,when Zheng He happened to start the second voyage.There must be some relationship between them.Because their incidences,histories and effects in the first and the second Zheng He'voyage were different,the government conferred different titles on Mazu and the God of Nanhai.This article will analyse the relationship between the godliness of Mazu,the God of Nanhai and Zheng He'voyages,and find out why two titles were not consistent with the godliness of the common people.