The purpose of presenting this article is to investigate and explain the place of the Book of Al-Ghadir in the Shia world and to investigate its characteristics. Allameh Amini has carefully studied all the books of interpretation, narrative, history, regalia, ansab, language and poetry for the writing of al-Ghadir. The characteristic of Allameh Amini was idealism and love for Islamic and Shia ideals. The Book of Al-Ghadir expresses the measure and standard of respect for the Companions and followers. When he criticizes the caliphs, companions and followers, his criticism is fair, accurate, logical and documented. This book is actually a kind of invitation to the unity of the Islamic Ummah. Sincerity, effort, diligence, conscientiousness and religious zeal in the face of doubts, attacks and difficulties, as well as chronology and attention to the needs of the time are lessons that can be learned from Allameh Amini. The true position of Al-Ghadir can be recognized when we see what impact this great scientific and religious work has had on scientists, elders, and ordinary people in the streets and markets.