Master Sheng Yen, who created Dhamm Drum Mountain in 1989, said that the vision is “Uplift the Character of Humanity and Build a Pure Land on Earth.” What is the vision of so-called “a Pure Land on Earth?” Why emphasize “a Pure Land on Earth,” not “a Buddhist Pure Land?” How to build “a Pure Land on Earth?” What is the difference between “a Pure Land on Earth” and “Uttarakuru” in the Sutta? Since the Discipline is the protection of all Buddhists, why should he put emphasis on the Bodhisattva Vows rather than the Five Precepts or Ten Good Deeds? In addition, in order to purify the mind, purify the social and build a Pure Land on Earth, he presented a series of social purification campaign, such as “Fivefold Spiritual Renaissance Campaign,” “The Six Ethics of the Mind Campaign” and so on, all these spirit Enlightenment movements use the “Green Mind” as the main base. What is the true meaning of the “Green Mind?” Has it anything to do with “a Pure Land on Earth? ” This paper will discuss several ideas. First, from the spirit and features of Bodhisattva Trimeric Pure Precepts to explore that how he went back to the spirit of Buddha, found the way to uplift the character of humanity. Then through the green mind, how he promoted social purification campaign then trying to build a Pure Land.